JP7428121B2 - Occupant protection device - Google Patents

Occupant protection device Download PDF

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JP7428121B2
JP7428121B2 JP2020214959A JP2020214959A JP7428121B2 JP 7428121 B2 JP7428121 B2 JP 7428121B2 JP 2020214959 A JP2020214959 A JP 2020214959A JP 2020214959 A JP2020214959 A JP 2020214959A JP 7428121 B2 JP7428121 B2 JP 7428121B2
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occupant
inflation
airbag
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shoulder restraint
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JP2022032920A (en
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真史 山田
敦 中村
雄士 松崎
和実 深浦
泰士 増田
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Toyoda Gosei Co Ltd
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Description

本発明は、シートに着座した乗員を保護するための乗員保護装置に関する。 The present invention relates to an occupant protection device for protecting an occupant seated on a seat.

従来、乗員保護装置としては、シートベルトにおいて装着時に乗員の腰部を拘束するラップベルトの領域に、折り畳まれたエアバッグを配置させ、エアバッグを、インフレーターからの膨張用ガスを内部に流入させて、乗員の前方を覆うように膨張させる構成のものがあった(例えば、特許文献1参照)。この従来の乗員保護装置では、エアバッグの膨張完了形状を、軸方向を左右方向に略沿わせた略三角柱形状としており、このエアバッグの膨張完了時の下面を乗員の大腿部と当接させることにより、乗員の大腿部に支持された状態で、乗員の上半身と対向して配置される後面から構成される上半身拘束面により、乗員の胸部から頭部にかけて拘束させる構成であった。 Conventionally, occupant protection devices have consisted of placing a folded airbag in the region of the lap belt that restrains the occupant's lower back when the seatbelt is worn, and allowing inflation gas from an inflator to flow into the airbag. , there was one that was configured to be inflated to cover the front of the occupant (for example, see Patent Document 1). In this conventional occupant protection device, the airbag has a substantially triangular prism shape when the airbag is fully inflated, with the axis substantially parallel to the left-right direction, and the lower surface of the airbag comes into contact with the occupant's thigh when the airbag is fully inflated. By doing so, while the vehicle is supported by the occupant's thighs, the occupant is restrained from the chest to the head by the upper body restraining surface formed from the rear surface, which is placed opposite the occupant's upper body.

特開2020-66425公報Japanese Patent Application Publication No. 2020-66425

しかし、従来の乗員保護装置では、エアバッグの上半身拘束面は、略平面状とされていることから、上半身拘束面によって乗員の上半身を受け止める際に、胸部が上半身拘束面と直ちに接触することとなって、乗員の上半身をソフトに保護する点に、改善の余地があった。 However, in conventional occupant protection devices, the upper body restraint surface of the airbag is substantially flat, so when the upper body restraint surface catches the occupant's upper body, the chest does not come into immediate contact with the upper body restraint surface. Therefore, there was room for improvement in providing soft protection for the upper body of the occupants.

本発明は、上述の課題を解決するものであり、乗員の上半身を、ソフトで、かつ、的確に拘束可能な乗員保護装置を提供することを目的とする。 The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an occupant protection device that can softly and accurately restrain the upper body of an occupant.

本発明に係る乗員保護装置は、シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれたエアバッグを収納させて保持するとともに、シートに着座した乗員の腰部の前方に配置される保持体と、
エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
エアバッグが、内部に膨張用ガスを流入させて保持体から突出し、乗員の前方を覆うように膨張する構成とされるとともに、
膨張完了時に乗員の左右の肩の前方に配置されて、肩を拘束可能に構成される肩拘束部と、
膨張完了時の下端側において肩拘束部を支持するとともに膨張完了時に前記乗員の左右の大腿部の上面を覆うように配置されて、膨張完了時の下面側に、乗員受止時に乗員の左右の大腿部により支持される被支持面を、配設させて構成される支持膨張部と、
を備えていることを特徴とする。
The occupant protection device according to the present invention is an occupant protection device for protecting an occupant seated on a seat, and includes:
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holding body that stores and holds the folded airbag and is placed in front of the waist of an occupant seated in the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant,
a shoulder restraint part configured to be placed in front of the left and right shoulders of the occupant and capable of restraining the shoulders when inflation is completed;
It is arranged to support the shoulder restraint part on the lower end side when the inflation is completed, and to cover the upper surface of the left and right thighs of the occupant when the inflation is completed, and to support the shoulder restraint part on the lower end side when the inflation is completed. a support expansion section configured by disposing a supported surface supported by the thigh of the patient;
It is characterized by having the following.

本発明の乗員保護装置では、エアバッグの膨張完了時において、乗員が上半身を下半身に近づけるように移動する際に、まず、左右の肩の前方に配置される肩拘束部が、乗員の左右の肩を拘束して、上半身の前方移動を抑制することとなる。すなわち、本発明の乗員保護装置では、肩拘束部によって左右の肩を受け止めることにより、上半身の前方移動する運動エネルギーを吸収できることから、膨張を完了させたエアバッグにより、乗員の上半身の前傾移動を規制することができる。そして、本発明の乗員保護装置では、膨張完了時のエアバッグの下端側に、肩拘束部を支持して、乗員の左右の大腿部の上面を覆う支持膨張部が、配設される構成であり、この支持膨張部は、下面側に配設される被支持面により、広い面積で左右の大腿部に支持されることとなる。そのため、乗員が、肩拘束部によって左右の肩を拘束されつつ上半身をさらに下半身に近づけるように移動することとなっても、支持膨張部によって肩拘束部の下方を安定して支持させることができて、肩拘束部による左右の肩の拘束を安定させることができ、乗員の上半身をソフトで、かつ、的確に拘束することができる。 In the occupant protection device of the present invention, when the occupant moves his upper body closer to his lower body when the airbag is fully inflated, the shoulder restraints placed in front of the left and right shoulders first The shoulders are restrained and the forward movement of the upper body is restrained. In other words, in the occupant protection device of the present invention, the kinetic energy of the forward movement of the upper body can be absorbed by absorbing the kinetic energy of the forward movement of the upper body by catching the left and right shoulders with the shoulder restraint part. can be regulated. In the occupant protection device of the present invention, a support inflation section is disposed on the lower end side of the airbag when inflation is completed, supporting the shoulder restraint section and covering the upper surfaces of the left and right thighs of the occupant. This support expansion part is supported by the left and right thighs over a wide area by the supported surface disposed on the lower surface side. Therefore, even if the occupant moves his upper body closer to his lower body while his left and right shoulders are restrained by the shoulder restraints, the support expansion part can stably support the lower part of the shoulder restraints. As a result, the right and left shoulders can be stably restrained by the shoulder restraint portion, and the upper body of the occupant can be restrained softly and accurately.

したがって、本発明の乗員保護装置では、乗員の上半身を、ソフトで、かつ、的確に拘束することができる。 Therefore, with the occupant protection device of the present invention, the upper body of the occupant can be restrained softly and accurately.

また、本発明の乗員保護装置において、エアバッグを、膨張完了時に乗員の左右の大腿部の上面側において前後方向に略沿って延びるような略板状として構成される支持膨張部と、膨張完了時に支持膨張部の前端側から後上側に向かって延びるような略板状として形成される前側膨張部と、を備える構成として、前側膨張部の後端側の領域を、乗員の左右の肩を拘束可能な肩拘束部とする構成としてもよく、このような構成とすれば、前側膨張部の後端側の領域から構成される肩拘束部が、シートに着座した乗員の左右の肩の前方において左右方向に略沿って配置されることから、エアバッグが、乗員に対して多少左右でずれた位置で膨張することとなっても、肩拘束部によって、左右の肩を安定して拘束することが可能となって、好ましい。 Further, in the occupant protection device of the present invention, the airbag includes a support inflation section configured as a substantially plate-shaped member that extends substantially along the front and back direction on the upper surface side of the left and right thighs of the occupant when inflation is completed; When completed, the front inflatable part is formed in a substantially plate shape extending from the front end side of the support inflatable part toward the rear upper side. It is also possible to have a configuration in which the shoulder restraint part is configured to restrain the left and right shoulders of the occupant seated on the seat. With such a configuration, the shoulder restraint part constituted by the region on the rear end side of the front side inflatable part can restrain the left and right shoulders of the occupant seated on the seat. Since the airbag is positioned approximately along the left-right direction in the front, even if the airbag inflates at a position that is slightly deviated from the left and right relative to the occupant, the shoulder restraint section will stably restrain the left and right shoulders. It is possible to do so, which is preferable.

そして、上記構成の乗員保護装置において、エアバッグに、膨張完了時の前側膨張部の後端を支持膨張部側から離隔させるような拡開を抑制可能な拡開抑制手段を、配設させる構成とすれば、前側膨張部の支持膨張部に対する位置を安定させることができ、換言すれば、肩拘束部の乗員に対する配置位置を、上方へずらすことなく、安定させることが可能となって、好ましい。 In the occupant protection device having the above configuration, the airbag is provided with an expansion suppressing means capable of suppressing the expansion so as to separate the rear end of the front inflatable part from the support inflatable part side when inflation is completed. This is preferable because it is possible to stabilize the position of the front side inflatable part with respect to the support inflatable part, and in other words, it is possible to stabilize the position of the shoulder restraint part relative to the occupant without shifting upward. .

さらに、本発明の乗員保護装置において、支持膨張部を、エアバッグの膨張完了時に、乗員の左右の大腿部の上面側において前後方向に略沿って延びるような略板状として構成し、
肩拘束部を、エアバッグの膨張完了時に、支持膨張部の左右両端近傍においてそれぞれ上方に延びるように形成するとともに、前後方向に略沿った略板状として、後面側によって、乗員の左右の肩を、それぞれ、拘束可能に構成してもよい。
Furthermore, in the occupant protection device of the present invention, the support inflation section is configured to have a substantially plate shape that extends substantially along the front-rear direction on the upper surface side of the left and right thighs of the occupant when the airbag completes inflation;
The shoulder restraint part is formed to extend upward near both left and right ends of the support inflation part when the airbag is fully inflated, and is generally plate-shaped along the front-rear direction, so that the shoulder restraint part is formed on the rear side to restrain the right and left shoulders of the occupant. may each be configured to be constrained.

乗員保護装置を上記構成とすれば、エアバッグの膨張完了時に、乗員の左右の肩をそれぞれ拘束する肩拘束部が、乗員の前方において上下方向に略沿って配置されることから、体格が異なっていても(シートに対する肩の上下の位置が異なっていても)、乗員を、安定して保護することができる。 If the occupant protection device has the above configuration, the shoulder restraint portions that restrain the left and right shoulders of the occupant, respectively, when the airbag is fully inflated, are arranged substantially along the vertical direction in front of the occupant. The occupant can be stably protected even if the occupant is in a different position (even if the upper and lower positions of the shoulder relative to the seat are different).

そして、上記構成の乗員保護装置において、肩拘束部を、相互の離隔を規制可能に、テザーによって相互に連結させる構成とすれば、肩拘束部によって乗員の左右の肩を受け止めた際に、肩拘束部が相互に離隔することを抑制でき、乗員の肩を、的確に拘束することができて、好ましい。 In the occupant protection device configured as described above, if the shoulder restraint parts are configured to be connected to each other by a tether so that the separation between them can be restricted, when the right and left shoulders of the occupant are received by the shoulder restraint parts, the shoulders This is preferable because the restraint parts can be prevented from separating from each other and the shoulders of the occupant can be restrained accurately.

また、上記構成の乗員保護装置において、各肩拘束部を、相互の離隔を規制可能に、内部に膨張用ガスを流入させて膨張する連通膨張部により、相互に連通させる構成としてもよく、このような構成とする場合、膨張した連通膨張部は、テザーと比較して剛性が高いことから、エアバッグの膨張完了時の形状保持性を向上させることができて、肩を受け止めた際の肩拘束部の大きな変形、換言すれば、肩拘束部の相互の離隔や接近を、抑制でき、乗員の肩を、一層的確に拘束することができる。 Further, in the occupant protection device configured as described above, each shoulder restraint part may be configured to communicate with each other by a communication inflation part that is inflated by allowing inflation gas to flow into the inside so that the separation between the shoulder restraint parts can be restricted. In such a configuration, since the inflated communicating inflatable part has higher rigidity than the tether, it is possible to improve the shape retention of the airbag when the airbag is fully inflated. Large deformation of the restraint parts, in other words, separation or approach of the shoulder restraint parts from each other can be suppressed, and the shoulders of the occupant can be restrained more accurately.

さらにまた、本発明の乗員保護装置において、エアバッグを、膨張完了形状を軸方向を左右方向に略沿わせた略三角柱状として、下端側の領域を支持膨張部とし、膨張完了時の上端側における左右両端側の部位を、肩拘束部とするとともに、肩拘束部間となる上端側における左右の中央側の領域の後面側を、相対的に前方に凹ませるように、構成してもよく、このような構成とすれば、支持膨張部と肩拘束部とが、間に凹んだ領域を配置させず、連なるように一体的に構成されていることから、左右の肩を受け止めた際の肩拘束部を、一層安定して支持膨張部により支持させることが可能となり、乗員を安定して保護することができる。また、肩拘束部の間の領域は、相対的に前方に凹むように構成されていることから、乗員の胸部が、肩を拘束される前に、エアバッグと接触することも、的確に抑制できる。 Furthermore, in the occupant protection device of the present invention, the airbag has a substantially triangular prism shape with the axial direction substantially parallel to the left and right direction, and the lower end region is the support inflation portion, and the upper end side when the inflation is completed. The parts on both the left and right ends of the shoulder restraint part may be used as the shoulder restraint parts, and the rear surface side of the region on the left and right center sides on the upper end side between the shoulder restraint parts may be configured to be recessed relatively forward. With such a configuration, the support expansion part and the shoulder restraint part are integrally constructed so as to be continuous without placing a recessed area between them, so that when the left and right shoulders are received, The shoulder restraint part can be more stably supported by the support expansion part, and the occupant can be stably protected. In addition, since the area between the shoulder restraints is configured to be relatively recessed forward, it is possible to accurately prevent the occupant's chest from coming into contact with the airbag before the shoulders are restrained. can.

さらにまた、本発明の乗員保護装置において、エアバッグを、支持膨張部の上方となる領域に、膨張完了時の後端側において上下方向に略沿って延びるように形成されて、肩拘束部に肩を拘束された状態の乗員の胸部を受け止め可能とされる胸部受止面を配設させる構成とするとともに、
胸部受止面の上方となる膨張完了時の上端側に、乗員の頭部を保護可能とされる頭部保護部を、配設させる構成としてもよい。
Furthermore, in the occupant protection device of the present invention, the airbag is formed in a region above the support inflation part so as to extend substantially along the vertical direction at the rear end side when inflation is completed, and the airbag is formed in the shoulder restraint part. In addition to having a configuration in which a chest receiving surface is provided that can receive the chest of an occupant whose shoulders are restrained,
A head protection portion capable of protecting the occupant's head may be disposed above the chest receiving surface on the upper end side when inflation is complete.

乗員保護装置を上記構成とすれば、乗員は、肩拘束部によって左右の肩を拘束された状態で、膨張完了時の上端側に形成される頭部保護部によって頭部を受け止められ、その後、胸部受止面によって、胸部を受け止められることから、左右の肩だけではなく、乗員の頭部と胸部も、エアバッグにより、直接受け止めて保護することができる。 If the occupant protection device has the above configuration, the occupant's head is received by the head protection portion formed on the upper end side when inflation is completed, with the left and right shoulders restrained by the shoulder restraint portions, and then, Since the chest is received by the chest receiving surface, not only the left and right shoulders, but also the head and chest of the occupant can be directly received and protected by the airbag.

さらに、上記構成の乗員保護装置において、胸部受止面を、エアバッグの内部に配設されるテザーによって、エアバッグの膨張完了時に、後方への突出を規制させる構成とすれば、膨張完了時に胸部受止面が過度に後方に突出して配置されることを抑制でき、換言すれば、実際に乗員の肩と接触する肩拘束部の後端と、胸部受止面と、の前後方向側での離隔距離を安定して維持させることができて、肩拘束部による肩拘束後に、胸部受止面によって、安定して乗員の胸部をソフトに保護することが可能となって、好ましい。 Furthermore, in the occupant protection device configured as described above, if the chest receiving surface is configured to restrict rearward protrusion by a tether disposed inside the airbag when the airbag completes inflation, then It is possible to prevent the chest receiving surface from protruding excessively to the rear. In other words, it is possible to prevent the chest receiving surface from protruding excessively rearward. This is preferable because it is possible to maintain the separation distance stably, and after the shoulders are restrained by the shoulder restraint part, it is possible to stably and softly protect the chest of the occupant by the chest receiving surface.

さらにまた、上記構成の乗員保護装置において、支持膨張部に、被支持面から下方に突出しつつ、乗員の左右の前記大腿部間に進入するように膨張する突出部を、配設させる構成とすれば、この突出部を、大腿部間に進入させるように膨張させることにより、エアバッグを、左右方向側の中央を、乗員の左右方向側の中央と略一致させるように、位置決めして膨張させることが可能となって、好ましい。 Furthermore, in the occupant protection device configured as described above, the support expansion portion may include a protrusion portion that protrudes downward from the supported surface and expands so as to enter between the left and right thighs of the occupant. Then, by inflating this protrusion so that it enters between the thighs, the airbag is positioned so that the lateral center of the airbag substantially coincides with the lateral center of the occupant. It is preferable because it can be expanded.

さらにまた、上記構成の乗員保護装置において、保持体を、シートベルトにおいて装着時に乗員の腰部を拘束するラップベルトから、構成すれば、エアバッグを保持するための保持体を別途設けなくともよく、構成部品の増大を抑制できて、好ましい。 Furthermore, in the occupant protection device configured as described above, if the holding body is configured from a lap belt that restrains the waist of the occupant when worn on the seat belt, there is no need to separately provide a holding body for holding the airbag. This is preferable because the increase in the number of component parts can be suppressed.

本発明の一実施形態である乗員保護装置を搭載させたシートの斜視図である。FIG. 1 is a perspective view of a seat equipped with an occupant protection device according to an embodiment of the present invention. 図1のシートの側面図である。FIG. 2 is a side view of the seat of FIG. 1; 図1のシートの正面図であり、シートベルトが装着された状態を示す。FIG. 2 is a front view of the seat of FIG. 1, showing a state in which a seat belt is attached. 実施形態の乗員保護装置において使用されるエアバッグを、単体で膨張させた状態を示す後方側から見た概略斜視図である。FIG. 2 is a schematic perspective view of the airbag used in the occupant protection device of the embodiment, viewed from the rear side, showing a state in which the airbag is inflated singly. 図4のエアバッグの背面図である。5 is a rear view of the airbag of FIG. 4. FIG. 図4のエアバッグの前後方向に沿った概略縦断面図である。FIG. 5 is a schematic longitudinal cross-sectional view of the airbag shown in FIG. 4 along the front-rear direction. 図4のエアバッグの前後方向に沿った概略横断面図である。FIG. 5 is a schematic cross-sectional view of the airbag of FIG. 4 along the front-rear direction. 図4のエアバッグを構成する基材を並べた平面図である。FIG. 5 is a plan view in which base materials constituting the airbag of FIG. 4 are arranged. 実施形態の乗員保護装置において、エアバッグが膨張を完了させた状態のシートの正面図である。FIG. 2 is a front view of the seat in a state where the airbag has completed inflation in the occupant protection device of the embodiment. 実施形態の乗員保護装置において、エアバッグが膨張を完了させた状態のシートの側面図である。FIG. 3 is a side view of the seat in a state where the airbag has completed inflation in the occupant protection device of the embodiment. 実施形態の乗員保護装置において、エアバッグが膨張を完了させた状態のシートの平面図である。FIG. 2 is a plan view of the seat in a state where the airbag has completed inflation in the occupant protection device of the embodiment. 実施形態の乗員保護装置において、膨張を完了させたエアバッグにより乗員を拘束する状態を示す側面図である。FIG. 2 is a side view illustrating a state where an occupant is restrained by a fully inflated airbag in the occupant protection device of the embodiment. 本発明の他の実施形態である乗員保護装置を搭載させたシートの正面図である。FIG. 7 is a front view of a seat equipped with an occupant protection device according to another embodiment of the present invention. 図13の乗員保護装置において、エアバッグが膨張を完了させた状態のシートの側面図である。FIG. 14 is a side view of the seat in the occupant protection device of FIG. 13 in a state where the airbag has completed inflation. 本発明の他の実施形態であるエアバッグを、単体で膨張させた状態を示す後方側から見た概略斜視図である。FIG. 7 is a schematic perspective view of an airbag according to another embodiment of the present invention, viewed from the rear side, showing a state in which it is inflated. 図15のエアバッグの前後方向に沿った概略縦断面図である。FIG. 16 is a schematic vertical cross-sectional view of the airbag shown in FIG. 15 along the front-rear direction. 図15のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの正面図である。16 is a front view of the seat in a state where the airbag has completed inflation in the passenger protection device using the airbag shown in FIG. 15. FIG. 図15のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの側面図である。16 is a side view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 15. FIG. 図15のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの平面図である。16 is a plan view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 15. FIG. 変形例のエアバッグを示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows the airbag of a modification. 本発明のさらに他の実施形態であるエアバッグを、単体で膨張させた状態を示す後方側から見た概略斜視図である。FIG. 7 is a schematic perspective view of an airbag according to still another embodiment of the present invention, viewed from the rear side, showing a state in which it is inflated. 図21のエアバッグの前後方向に沿った概略縦断面図である。FIG. 22 is a schematic longitudinal cross-sectional view of the airbag of FIG. 21 along the front-rear direction. 図21のエアバッグの左右方向に沿った概略縦断面図である。FIG. 22 is a schematic vertical cross-sectional view of the airbag shown in FIG. 21 along the left-right direction. 図21のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの正面図である。22 is a front view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 21. FIG. 図21のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの側面図である。22 is a side view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 21. FIG. 図21のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの平面図である。22 is a plan view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 21. FIG. 他の変形例のエアバッグを示す前後方向に沿った概略縦断面図である。FIG. 7 is a schematic vertical cross-sectional view along the front-rear direction showing another modified example of an airbag. 図27のエアバッグの左右方向に沿った概略縦断面図である。FIG. 28 is a schematic vertical cross-sectional view along the left-right direction of the airbag of FIG. 27; 本発明のさらに他の実施形態であるエアバッグを、単体で膨張させた状態を示す後方側から見た概略斜視図である。FIG. 7 is a schematic perspective view of an airbag according to still another embodiment of the present invention, viewed from the rear side, showing a state in which it is inflated. 図29のエアバッグの前後方向に沿った概略縦断面図である。FIG. 30 is a schematic vertical cross-sectional view of the airbag of FIG. 29 along the front-rear direction. 図29のエアバッグの前後方向に沿った概略横断面図である。FIG. 30 is a schematic cross-sectional view of the airbag shown in FIG. 29 along the front-rear direction. 図29のエアバッグの左右方向に沿った概略縦断面図である。FIG. 30 is a schematic vertical cross-sectional view of the airbag shown in FIG. 29 along the left-right direction. 図29のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの正面図である。30 is a front view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 29. FIG. 図29のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの側面図である。30 is a side view of the seat in a state where the airbag has completed inflation in the passenger protection device using the airbag shown in FIG. 29. FIG. 図29のエアバッグを使用した乗員保護装置において、エアバッグが膨張を完了させた状態のシートの平面図である。30 is a plan view of the seat in a state where the airbag has completed inflation in the occupant protection device using the airbag shown in FIG. 29; FIG.

以下、本発明の一実施形態を図面に基づいて説明する。実施形態の乗員保護装置Sは、図1~3に示すように、車両のシート1に搭載されるもので、エアバッグ25を保持する保持体を構成するシートベルト7と、エアバッグ25と、インフレーター17と、を備える構成とされている。シート1は、背もたれ部2と座部3とを備えている。なお、実施形態では、前後上下左右の方向は、特に断らない限り、シート1の前後上下左右の方向と一致している。 Hereinafter, one embodiment of the present invention will be described based on the drawings. The occupant protection device S of the embodiment is mounted on a seat 1 of a vehicle, as shown in FIGS. 1 to 3, and includes a seat belt 7 constituting a holder that holds an air bag 25, an air bag 25, It is configured to include an inflator 17. The seat 1 includes a backrest 2 and a seat 3. In the embodiment, the front, rear, top, bottom, left and right directions correspond to the front, back, top, bottom, left and right directions of the seat 1 unless otherwise specified.

シートベルト7は、実施形態の場合、シート1に搭載されるもので、シート1に着座した乗員MPを拘束するためのベルト本体8と、ベルト本体8に取り付けられるタングプレート12と、タングプレート12を連結させるためのバックル13と、を備える構成とされている。ベルト本体8は、背もたれ部2内に配置される図示しないリトラクタの巻取軸に一端を係止され、他端側を、シート1における座部3の後端3b左方に配置されるアンカ部材14(図1,2参照)に係止されている。詳細には、ベルト本体8は、背もたれ部2の上端左縁側から外部に露出されるように配置されるもので、実施形態の場合、乗員MPの非着座状態においては、図1,2に示すように、エアバッグ25を保持させている保持体としてのラップベルト10を、背もたれ部2の前面に露出させるように、構成されている。詳細には、ラップベルト10は、乗員MPの非着座状態において、図1に示すように、背もたれ部2の左縁2a側において、上下方向に略沿うようにして、背もたれ部2の前面に露出されている。ベルト本体8は、ラップベルト10と、背もたれ部2内に収納されるショルダーベルト9と、を有し、乗員着座時においてタングプレート12をバックル13に連結させた状態で、アンカ部材14とバックル13との間において左右方向に略沿うように配置されるラップベルト10によって乗員MPの下半身MD(腰部MW)を拘束し、背もたれ部2の上端左縁側から延びつつバックル13にかけて斜めに配置されるショルダーベルト9によって乗員MPの上半身MU(肩MSから胸部MBにかけて)を拘束する構成とされている(図3参照)。そして、実施形態の場合、乗員着座時に、シート1に着座した乗員MPの腰部MWの前方に配置されるラップベルト10と、後述するカバー22と、が、折り畳まれたエアバッグ25を収納させて保持する保持体を、構成している。 In the case of the embodiment, the seat belt 7 is mounted on the seat 1 and includes a belt body 8 for restraining the occupant MP seated on the seat 1, a tongue plate 12 attached to the belt body 8, and a tongue plate 12. The configuration includes a buckle 13 for connecting the two. The belt body 8 has one end locked to a winding shaft of a retractor (not shown) disposed inside the backrest 2, and the other end attached to an anchor member disposed to the left of the rear end 3b of the seat 3 in the seat 1. 14 (see FIGS. 1 and 2). Specifically, the belt main body 8 is arranged so as to be exposed to the outside from the upper left edge side of the backrest portion 2, and in the case of the embodiment, when the occupant MP is not seated, the belt main body 8 is shown in FIGS. 1 and 2. Thus, the lap belt 10 serving as a holder holding the airbag 25 is exposed on the front surface of the backrest portion 2. Specifically, when the occupant MP is not seated, the lap belt 10 is exposed on the front surface of the backrest portion 2 on the left edge 2a side of the backrest portion 2, approximately along the vertical direction, as shown in FIG. has been done. The belt main body 8 includes a lap belt 10 and a shoulder belt 9 stored in the backrest portion 2, and when the passenger is seated, the tongue plate 12 is connected to the buckle 13, and the anchor member 14 and the buckle 13 are connected to each other. The lower body MD (lumbar region MW) of the occupant MP is restrained by a lap belt 10 arranged substantially along the left-right direction between The belt 9 is configured to restrain the upper body MU (from the shoulders MS to the chest MB) of the occupant MP (see FIG. 3). In the case of the embodiment, when the occupant is seated, the lap belt 10 disposed in front of the waist MW of the occupant MP seated on the seat 1 and the cover 22, which will be described later, accommodate the folded airbag 25. It constitutes a holder for holding.

インフレーター17は、シート1に搭載されるもので、詳細には、実施形態の場合、シート1における座面3aよりも下方となる位置に、配設されている。具体的には、インフレーター17は、図2に示すように、座部3より下方のシート1の背面側において軸方向を左右方向に略沿わせて配置される略円柱状のインフレーター本体18(詳細な図示省略)と、インフレーター本体18から延びてエアバッグ25に膨張用ガスを供給するパイプ部19と、を備えている。パイプ部19は、金属製として、インフレーター本体18から延びて、先端を、シート1の左方において、座部3と背もたれ部2との境界部位付近に位置させるように、配設されるもので、この先端を、クランプ20を利用して、エアバッグ25における後述する導管部55と接続させる構成とされている。 The inflator 17 is mounted on the seat 1, and specifically, in the embodiment, it is disposed at a position below the seat surface 3a of the seat 1. Specifically, as shown in FIG. 2, the inflator 17 has a substantially cylindrical inflator main body 18 (details (not shown) and a pipe portion 19 extending from the inflator body 18 and supplying inflation gas to the airbag 25. The pipe portion 19 is made of metal and extends from the inflator body 18, and is disposed such that its tip is located near the boundary between the seat portion 3 and the backrest portion 2 on the left side of the seat 1. This tip is configured to be connected to a conduit portion 55 of the airbag 25, which will be described later, using the clamp 20.

エアバッグ25は、シートベルト7のラップベルト10とカバー22とを保持体として、長尺状に折り畳まれて、周囲をカバー22に覆われつつラップベルト10に保持されるもので、具体的には、シートベルト7の装着時におけるラップベルト10の上面側に重ねられるようにして、周囲をカバー22に覆われて、ラップベルト10の領域に配置されている(図3参照)。換言すれば、実施形態では、エアバッグ25は、ラップベルト10とカバー22との間の隙間に、折り畳まれて収納される構成である。また、図1に示すような非装着状態においては、エアバッグ25は、背もたれ部2の前面に露出しているラップベルト10の背面側(背もたれ部2側)に、配置されている。カバー22は、エアバッグ25の展開膨張時に破断可能に構成されている。 The airbag 25 is folded into a long shape using the lap belt 10 of the seat belt 7 and the cover 22 as a holder, and is held on the lap belt 10 while being covered with the cover 22. is arranged in the area of the lap belt 10, covered with a cover 22, so as to overlap the upper surface side of the lap belt 10 when the seat belt 7 is worn (see FIG. 3). In other words, in the embodiment, the airbag 25 is folded and stored in the gap between the lap belt 10 and the cover 22. Moreover, in the non-installed state as shown in FIG. 1, the airbag 25 is arranged on the back side (backrest part 2 side) of the lap belt 10 exposed on the front side of the backrest part 2. The cover 22 is configured to be breakable when the airbag 25 is deployed and inflated.

エアバッグ25は、図4~7に示すように、バッグ本体26と、インフレーター17と接続されてバッグ本体26に膨張用ガスを流入させる導管部55と、バッグ本体26をラップベルト10に取り付けるための取付部58と、を備えている。 As shown in FIGS. 4 to 7, the airbag 25 includes a bag body 26, a conduit portion 55 that is connected to the inflator 17 and allows inflation gas to flow into the bag body 26, and a conduit portion 55 for attaching the bag body 26 to the lap belt 10. A mounting portion 58 is provided.

バッグ本体26は、実施形態の場合、膨張完了時に乗員MPの上半身MUの前方を覆うように膨張する本体膨張部28と、膨張完了時に乗員MPの左右の肩MSL,MSRを拘束する肩拘束部50L,50Rと、を備えている。 In the case of the embodiment, the bag main body 26 includes a main body inflation part 28 that inflates to cover the front of the upper body MU of the occupant MP when inflation is completed, and a shoulder restraint part that restrains the left and right shoulders MSL and MSR of the occupant MP when inflation is completed. 50L and 50R.

本体膨張部28は、膨張完了時の外形形状を、軸方向を左右方向に略沿わせた略三角柱形状とされており、前後方向側から見た状態での膨張完了形状を、上下に幅広とした略長方形状とするように、構成されている。そして、実施形態の場合、本体膨張部28において、膨張完了時の下端28b側の領域が、膨張完了時に乗員MPの左右の大腿部MTL,MTRの上面を覆う支持膨張部38を構成し、膨張完了時の上端28a側の領域が、乗員MPの頭部MHを保護可能とされる頭部保護部41を構成し、支持膨張部38の上方の領域であって支持膨張部38と頭部保護部41との間の領域が、乗員MPの胸部MBを保護可能とされる胸部保護領域42を構成している。 The main body inflatable portion 28 has an approximately triangular prism shape with the axial direction substantially parallel to the left and right directions when fully inflated. It is configured to have a substantially rectangular shape. In the case of the embodiment, in the main body inflatable part 28, the region on the lower end 28b side when the inflation is completed constitutes a support inflatable part 38 that covers the upper surfaces of the left and right thighs MTL and MTR of the occupant MP when the inflation is completed, The area on the upper end 28a side when inflation is completed constitutes a head protection part 41 capable of protecting the head MH of the occupant MP, and is the area above the support inflatable part 38, where the support inflatable part 38 and the head The area between the protection part 41 constitutes a chest protection area 42 capable of protecting the chest MB of the occupant MP.

また、本体膨張部28の外周壁は、膨張完了時に乗員MPから離れた前側に配置される前壁部29と、乗員MP側に配置される後上壁部30及び後下壁部31と、膨張完了時に左右方向側で対向して配置される左壁部32及び右壁部33と、から構成されている。 Further, the outer circumferential wall of the main body inflation portion 28 includes a front wall portion 29 disposed on the front side away from the occupant MP when inflation is completed, and a rear upper wall portion 30 and a rear lower wall portion 31 disposed on the occupant MP side. It is composed of a left wall portion 32 and a right wall portion 33 that are arranged to face each other in the left-right direction when inflation is completed.

後上壁部30は、エアバッグ25の膨張完了時に、乗員MPの上半身MUの前方を、腹部MAから頭部MHの下方にかけて覆うように、配置される構成である。この後上壁部30は、膨張完了時の本体膨張部28における後端側において、上下方向に略沿って延びるように形成されるもので、腹部MAの前方に配置される下端側を除いた領域(支持膨張部38の領域であって、胸部保護領域42の後面42a)が、肩拘束部50L,50Rによって肩MSL,MSRを拘束された状態の乗員MPの胸部MBを受止可能な胸部受止面43を構成している。すなわち、胸部受止面43は、上下方向に略沿って延びるとともに左右の肩拘束部50L,50Rの前部側と連なって形成されている。 The rear upper wall portion 30 is arranged so as to cover the front of the upper body MU of the occupant MP from the abdomen MA to the lower part of the head MH when the airbag 25 completes inflation. This rear upper wall portion 30 is formed to extend substantially along the vertical direction on the rear end side of the main body inflatable portion 28 when inflation is completed, excluding the lower end side located in front of the abdomen MA. The region (the region of the support expansion part 38 and the rear surface 42a of the chest protection region 42) is a chest capable of receiving the chest MB of the occupant MP whose shoulders MSL and MSR are restrained by the shoulder restraint parts 50L and 50R. It constitutes a receiving surface 43. That is, the chest receiving surface 43 extends substantially along the vertical direction and is formed to be continuous with the front sides of the left and right shoulder restraint parts 50L and 50R.

実施形態のエアバッグ25では、本体膨張部28の内部に、後上壁部30における上下左右の中央付近の領域と、前壁部29における上下左右の中央付近の領域と、を連結して、後上壁部30と前壁部29との離隔距離を規制するように、前後方向に沿って規制テザー45が配設される構成である(図6,7参照)。そして、実施形態の場合、後上壁部30は、この規制テザー45により、エアバッグ25の膨張完了時に、規制テザー45の後端45aを連結させている連結部位46R付近となる上下左右の中央付近を、前方に向かって凹ませる構成とされている。この規制テザー45は、帯状として、幅方向を上下方向に略沿わせて配置される構成であり、後端45aを後上壁部30に連結させている連結部位46Rは、規制テザー45の後端45aを、後上壁部30に、上下方向側で幅広の略長円状の縫合部位を形成するように縫着させて、構成されている。同様に、規制テザー45の前端45bは、上下方向で幅広の略長円上の縫合部位を形成するようにして、連結部位46Fによって、前壁部29に連結されている。なお、実施形態では、規制テザー45を本体膨張部28に連結させる連結部位46F,46Rの形成部位には、補強布73が、介在されている(図6~8参照)。連結部位46F,46Rは、実際には、補強布73の外周縁を全周にわたって縫着させている縫合部位と、規制テザー45の前端45b若しくは後端45a自体を前壁部29,後上壁部30に縫着させている縫合部位と、の二重円状に、形成されている(図4,5,8,9参照)。実施形態の場合、規制テザー45は、2枚のテザー用基材47,47から構成されている。 In the airbag 25 of the embodiment, a region near the center of the rear upper wall section 30 in the vertical and horizontal directions and a region near the center of the front wall section 29 in the vertical and horizontal directions are connected to the inside of the main body inflation section 28. A regulating tether 45 is disposed along the front-rear direction so as to regulate the separation distance between the rear upper wall portion 30 and the front wall portion 29 (see FIGS. 6 and 7). In the case of the embodiment, the rear upper wall portion 30 is located at the center of the upper, lower, left, and right sides near the connecting portion 46R that connects the rear end 45a of the restricting tether 45 when the airbag 25 completes inflation. The area is designed to be concave toward the front. The regulating tether 45 is shaped like a band and is arranged so that its width direction is substantially along the vertical direction. The end 45a is sewn to the rear upper wall portion 30 so as to form a wide, generally oval-shaped stitched portion on the vertical side. Similarly, the front end 45b of the regulating tether 45 is connected to the front wall portion 29 by a connecting portion 46F so as to form a substantially elliptical sutured portion that is wide in the vertical direction. Note that, in the embodiment, a reinforcing cloth 73 is interposed at the forming portions of the connecting portions 46F and 46R that connect the regulating tether 45 to the main body inflating portion 28 (see FIGS. 6 to 8). The connecting parts 46F and 46R are actually a sewing part where the outer peripheral edge of the reinforcing cloth 73 is sewn all around, and a sewing part where the front end 45b or the rear end 45a of the regulation tether 45 itself is connected to the front wall part 29 and the rear upper wall. It is formed in a double circular shape with the sutured part sewn to the part 30 (see FIGS. 4, 5, 8, and 9). In the case of the embodiment, the regulation tether 45 is composed of two tether base materials 47, 47.

この規制テザー45は、実施形態の場合、膨張完了時のエアバッグ25を左右方向側から見た状態で、上半分程度を肩拘束部50L,50Rの配置領域と左右方向側で重ならせるように、配設されている(図6参照)。規制テザー45の後端45aを後上壁部30に連結させている連結部位46Rは、胸部受止面43の上下左右の略中央となる位置であって、エアバッグ25の膨張完了時に、AM50ダミー相当の乗員MPの胸部MBの左右の中央付近となる位置に、配置されることとなる(図9,10参照)。換言すれば、胸部受止面43(後上壁部30)は、胸部MBの左右の中央付近に対応する上下左右の略中央に、前方に向かって凹む凹部43aを有する構成とされている。 In the case of the embodiment, the regulation tether 45 is arranged so that approximately the upper half overlaps the arrangement area of the shoulder restraint parts 50L and 50R on the left and right sides when the airbag 25 is viewed from the left and right sides when inflation is completed. (See Figure 6). A connecting portion 46R connecting the rear end 45a of the restriction tether 45 to the rear upper wall portion 30 is located approximately at the center of the chest receiving surface 43 in the vertical and horizontal directions, and when the airbag 25 completes inflation, the connecting portion 46R It will be placed near the center of the left and right sides of the chest MB of the occupant MP, who is equivalent to a dummy (see FIGS. 9 and 10). In other words, the chest receiving surface 43 (rear upper wall portion 30) has a concave portion 43a recessed toward the front at approximately the center in the vertical and horizontal directions corresponding to the vicinity of the horizontal center of the chest MB.

後下壁部31は、エアバッグ25の膨張完了時に、乗員MPの大腿部MTL,MTRに略沿うように、前後方向に略沿って配設される構成とされている。後下壁部31は、支持膨張部38の下面38aを構成するもので、換言すれば、後下壁部31は、乗員受止時に乗員MPの左右の大腿部MTL,MTRにより支持される被支持面39を、構成している。詳細には、実施形態の場合、本体膨張部28における後下壁部31の後端31aの下面側に、導管部55と連通される連通孔35が、配設される構成であり(図6,7参照)、被支持面39は、実際には、後下壁部31において導管部55よりも前側に配置される領域から、構成されている。 The rear lower wall portion 31 is configured to be disposed approximately along the front-rear direction so as to approximately follow the thighs MTL and MTR of the occupant MP when the airbag 25 is fully inflated. The rear lower wall portion 31 constitutes the lower surface 38a of the support expansion portion 38. In other words, the rear lower wall portion 31 is supported by the left and right thighs MTL and MTR of the occupant MP when the occupant is received. A supported surface 39 is configured. Specifically, in the case of the embodiment, a communication hole 35 communicating with the conduit part 55 is provided on the lower surface side of the rear end 31a of the rear lower wall part 31 in the main body expansion part 28 (see FIG. , 7), the supported surface 39 is actually composed of a region of the rear lower wall portion 31 that is disposed on the front side of the conduit portion 55.

実施形態では、本体膨張部28は、膨張完了時の上下方向側の幅寸法及び左右方向側の幅寸法を、後上壁部30により、乗員MPの上半身MUを、頭部MHを除いて略全面にわたって覆い可能な寸法に、設定され、膨張完了時の前後方向側の幅寸法を、後下壁部31(被支持面39)により、大腿部MTL,MTRの上面を、膝の近傍まで前後に広く覆い可能な寸法に、設定されている(図9~11参照)。詳細には、実施形態では、本体膨張部28は、膨張完了時における上端28aを、乗員MP(AM50ダミー相当)の頭部MHよりもわずかに下方に位置させるように、構成されている(図10参照)。すなわち、実施形態の乗員保護装置Sでは、乗員MPの頭部MHを保護する頭部保護部41は、エアバッグ25の膨張完了状態では、頭部MHの前下方となる位置に配置される構成である。 In the embodiment, the main body inflating section 28 has a width dimension in the vertical direction and a width dimension in the lateral direction when the inflation is completed. The dimensions are set so that the entire surface can be covered, and the width in the anteroposterior direction at the time of completion of inflation is set so that the upper surface of the thighs MTL and MTR is extended to the vicinity of the knees by the rear lower wall portion 31 (supported surface 39). The dimensions are set so that it can cover a wide area from front to back (see Figures 9 to 11). Specifically, in the embodiment, the main body inflating portion 28 is configured such that the upper end 28a upon completion of inflation is located slightly below the head MH of the occupant MP (corresponding to an AM50 dummy) (Fig. 10). That is, in the occupant protection device S of the embodiment, the head protection part 41 that protects the head MH of the occupant MP is arranged at a position below the front of the head MH when the airbag 25 is fully inflated. It is.

乗員MPの左右の肩MSL,MSRを拘束する各肩拘束部50L,50Rは、実施形態の場合、左右に2つ配設されている。各肩拘束部50L,50Rは、外形形状を同一として、エアバッグ25の膨張完了時に、本体膨張部28の上端28a側における左右両縁側において、それぞれ、本体膨張部28よりも後方に突出するように形成されて、膨張完了時の後端50bを、シート1に着座している乗員MPの左右の肩MSL,MSRの前側近傍に位置させるように、構成されている(図10,11参照)。各肩拘束部50L,50Rは、図7に示すように、それぞれ、本体膨張部28側に配置される内壁部51L,51Rと、本体膨張部28から離れた側に配置される外壁部52L,52Rと、を有して、膨張完了形状を、上下方向に略沿って配置される略長方形板状として(図6参照)、上下で広く肩MSL,MSRを拘束可能に構成されている。また、実施形態の場合、各肩拘束部50L,50Rは、膨張完了時の前端50c近傍となる位置で、連通孔36L,36Rを介して、本体膨張部28と連通されるもので、この連通孔36L,36Rの周縁を相互に結合させることにより、本体膨張部28と連結されるとともに、本体膨張部28(すなわち、支持膨張部38)により支持される構成とされている。各肩拘束部50L,50Rと本体膨張部28とを連通させる連通孔36L,36Rは、図6に示すように、開口形状を、上下方向に略沿った長尺状とされるとともに、上下両端側を、それぞれ、後方に延ばすような略コ字形として、構成されている。また、各肩拘束部50L,50Rは、乗員MPの肩MSL,MSRと当接する後端50b側にかけて上下に僅かに幅広とするように、構成されている。具体的には、各肩拘束部50L,50Rは、膨張完了時における上端50aの位置を、本体膨張部28における上端28aと略一致させ、上下方向側の幅寸法を、本体膨張部28の上下方向側の幅寸法の半分程度として、膨張完了時における後半分程度の領域を、本体膨張部28における後上壁部30(胸部受止面43)よりも後方に突出させるように、構成されている(図6参照)。実際には、各肩拘束部50L,50Rは、エアバッグ25の膨張完了時に、後端50bを、乗員MPの左右の肩MSL,MSRに近接させ、かつ、乗員MPの左右の肩MSL,MSRから上腕AL,ARにかけての前面側を、上下の略全域にわたって覆うように、配置される構成である(図9~11参照)。 In the embodiment, two shoulder restraining parts 50L and 50R that restrain the left and right shoulders MSL and MSR of the occupant MP are arranged on the left and right sides. Each of the shoulder restraint parts 50L and 50R has the same external shape, and is configured to protrude rearwardly from the main body inflatable part 28 on both left and right edge sides of the upper end 28a of the main body inflatable part 28, respectively, when the airbag 25 is fully inflated. The rear end 50b is configured to be located near the front side of the left and right shoulders MSL and MSR of the occupant MP seated on the seat 1 when the inflation is completed (see FIGS. 10 and 11). . As shown in FIG. 7, each shoulder restraint part 50L, 50R has an inner wall part 51L, 51R arranged on the main body inflation part 28 side, an outer wall part 52L, 52L arranged on the side away from the main body inflation part 28, respectively. 52R, the fully inflated shape is a substantially rectangular plate shape arranged substantially along the vertical direction (see FIG. 6), and is configured to be able to broadly restrain the shoulders MSL and MSR in the upper and lower directions. Further, in the case of the embodiment, each of the shoulder restraining parts 50L and 50R is communicated with the main body inflating part 28 through the communication holes 36L and 36R at a position near the front end 50c when the inflation is completed. By connecting the peripheries of the holes 36L and 36R to each other, they are connected to the main body inflating section 28 and are supported by the main body inflating section 28 (that is, the support inflating section 38). As shown in FIG. 6, the communication holes 36L and 36R that communicate the shoulder restraint parts 50L and 50R with the main body expansion part 28 have an elongated opening shape that extends approximately in the vertical direction, and have both upper and lower ends. It is constructed in a substantially U-shape with each side extending backward. Further, each of the shoulder restraining portions 50L and 50R is configured to be slightly wider vertically toward the rear end 50b side that contacts the shoulders MSL and MSR of the occupant MP. Specifically, each of the shoulder restraint parts 50L and 50R has its upper end 50a at the time of completion of inflation substantially aligned with the upper end 28a of the main body inflatable part 28, and the width dimension in the vertical direction is set to be the same as the upper and lower ends of the main body inflatable part 28. It is configured so that about half the width dimension on the direction side is made to project rearward from the rear upper wall part 30 (chest receiving surface 43) of the main body inflation part 28 when the inflation is completed. (See Figure 6). In reality, each of the shoulder restraint parts 50L and 50R brings the rear end 50b close to the left and right shoulders MSL and MSR of the occupant MP when the airbag 25 is fully inflated. It is arranged so as to cover substantially the entire upper and lower front side of the upper arms AL and AR (see FIGS. 9 to 11).

導管部55は、インフレーター17のパイプ部19と接続されるもので、バッグ本体26に連結される元部55a側を閉塞させ、先端55b側を、パイプ部19と接続可能に開口させて構成されるもので、エアバッグ25の膨張完了時に、ラップベルト10に略沿うように左右方向に略沿って配置される構成である(図9参照)。この導管部55は、図5,7に示すように、元部55a側の領域を、膨張完了時のバッグ本体26における本体膨張部28の下面側に配置させており、この元部55a側において、連通孔35により、本体膨張部28と連通されている。 The conduit section 55 is connected to the pipe section 19 of the inflator 17, and is configured by closing the base section 55a side connected to the bag body 26 and opening the tip end 55b side so that it can be connected to the pipe section 19. When the airbag 25 is fully inflated, it is arranged substantially along the left and right direction along the lap belt 10 (see FIG. 9). As shown in FIGS. 5 and 7, this conduit portion 55 has a region on the base portion 55a side located on the lower surface side of the main body inflation portion 28 in the bag body 26 when inflation is completed, and the region on the base portion 55a side , is communicated with the main body expansion portion 28 through a communication hole 35.

バッグ本体26をラップベルト10に取り付ける取付部58は、導管部55の元部55a側の部位の下面側に配設されるもので、ラップベルト10に略沿うように左右方向に略沿って配設される筒状として、導管部55の元部55a側の下面側に縫着されて、ラップベルト10を挿通可能に構成されている(図5,6参照)。この取付部58にラップベルト10を挿通させることにより、エアバッグ25は、ラップベルト10に保持される構成である。 The attachment portion 58 for attaching the bag body 26 to the lap belt 10 is disposed on the lower surface side of the base portion 55a side of the conduit portion 55, and is disposed approximately along the left-right direction so as to approximately follow the lap belt 10. The cylindrical shape is sewn to the lower surface of the conduit portion 55 on the base portion 55a side, so that the lap belt 10 can be inserted therethrough (see FIGS. 5 and 6). By inserting the lap belt 10 through the attachment portion 58, the airbag 25 is held by the lap belt 10.

実施形態のエアバッグ25は、所定形状の基布の周縁相互を結合させて形成されるもので、実施形態の場合、図8に示すように、本体膨張部28を構成する乗員側パネル62,前側パネル65と、各肩拘束部50L,50Rを構成する肩拘束部用パネル67L,67Rと、導管部55を構成する2枚の導管部用パネル69,70と、取付部58を構成する取付部用パネル72と、規制テザー45を構成するテザー用基材47,47と、規制テザー45の連結部位46F,46Rを補強する補強布73,73と、から構成されている。これらの乗員側パネル62,前側パネル65,肩拘束部用パネル67L,67R,導管部用パネル69,70,取付部用パネル72,テザー用基材47,補強布73は、それぞれ、ポリエステル糸やポリアミド糸等からなる可撓性を有した織布から形成されている。 The airbag 25 of the embodiment is formed by joining together the peripheral edges of a base fabric of a predetermined shape, and in the case of the embodiment, as shown in FIG. The front panel 65, the shoulder restraint panels 67L and 67R that constitute the shoulder restraints 50L and 50R, the two conduit panels 69 and 70 that constitute the conduit section 55, and the attachment that constitutes the attachment section 58. It is composed of a section panel 72, tether base materials 47, 47 that constitute the regulation tether 45, and reinforcing cloths 73, 73 that reinforce the connection parts 46F, 46R of the regulation tether 45. These passenger side panel 62, front side panel 65, shoulder restraint panels 67L, 67R, conduit panels 69, 70, attachment panel 72, tether base material 47, and reinforcing cloth 73 are made of polyester yarn or It is made of a flexible woven fabric made of polyamide thread or the like.

乗員側パネル62は、膨張完了時に乗員MP側に配置されて、本体膨張部28における後下壁部31から後上壁部30にかけての部位を、主に構成している。具体的には、乗員側パネル62は、主に後下壁部31を構成する下側部位64と、主に後上壁部30を構成する上側部位63と、を備えている。詳細には、下側部位64は、後下壁部31と、左壁部32及び右壁部33における後下側の領域と、を構成し、上側部位63は、後上壁部30と、左壁部32及び右壁部33における後上側の領域と、を構成するもので、それぞれ、外形形状を略六角形状とされている。そして、乗員側パネル62は、この下側部位64と上側部位63とを一辺で連結させたような外形形状とされている(図8参照)。 The passenger side panel 62 is disposed on the passenger MP side when inflation is completed, and mainly constitutes a portion of the main body inflatable portion 28 from the rear lower wall portion 31 to the rear upper wall portion 30. Specifically, the passenger side panel 62 includes a lower section 64 that mainly constitutes the rear lower wall section 31 and an upper section 63 that mainly constitutes the rear upper wall section 30 . In detail, the lower part 64 constitutes the rear lower wall part 31 and the lower rear area of the left wall part 32 and the right wall part 33, and the upper part 63 comprises the rear upper wall part 30, It constitutes the upper rear region of the left wall portion 32 and the right wall portion 33, and each has a substantially hexagonal outer shape. The passenger side panel 62 has an outer shape in which the lower portion 64 and the upper portion 63 are connected on one side (see FIG. 8).

前側パネル65は、膨張完了時の本体膨張部28における前壁部29を主に構成するもので、詳細には、前壁部29と、左壁部32及び右壁部33における前側の領域と、を構成している。この前側パネル65は、外形形状を略六角形状とされている。具体的には、前側パネル65の外形形状は、乗員側パネル62において下側部位64と上側部位63とを連結させている連結部位62aの左右に配置される後左縁63a,64a相互、後右縁63b,64b相互を、それぞれ結合させた残りの縁部(前縁63c,64c)相互を離隔させるように開いた状態の下側部位64及び上側部位63と、略一致させた六角形状とされている。本体膨張部28は、前側パネル65の外周縁65aと、後左縁63a,64a相互、後右縁63b,64b相互をそれぞれ結合させた状態の乗員側パネル62における下側部位64及び上側部位63の前縁63c,64cと、を結合させることにより、袋状とされる。 The front panel 65 mainly constitutes the front wall section 29 of the main body inflatable section 28 when inflation is completed, and in detail, the front panel 65 includes the front wall section 29 and the front regions of the left wall section 32 and the right wall section 33. , constitutes. The front panel 65 has a substantially hexagonal outer shape. Specifically, the outer shape of the front panel 65 is such that the rear left edges 63a and 64a located on the left and right sides of the connecting portion 62a that connects the lower portion 64 and the upper portion 63 in the passenger side panel 62, The right edges 63b and 64b are connected to each other, and the remaining edges (front edges 63c and 64c) have a hexagonal shape that is substantially aligned with the lower part 64 and the upper part 63 which are open so as to separate them from each other. has been done. The main body expansion part 28 is located at a lower part 64 and an upper part 63 of the passenger side panel 62 in a state where the outer peripheral edge 65a of the front panel 65, the rear left edges 63a and 64a, and the rear right edges 63b and 64b are respectively connected. By combining the front edges 63c and 64c of the bag, a bag-like shape is formed.

各肩拘束部50L,50Rを構成する肩拘束部用パネル67L,67Rは、外形形状を、内壁部51L,51R及び外壁部52L,52Rを後縁相互で連結させたような略長方形状とされており、二つ折りして周縁相互を結合させることにより、肩拘束部50L,50Rを構成することとなる。導管部55を構成する導管部用パネル69,70は、外形形状を同一とした2枚から、構成されている。取付部58を構成する取付部用パネル72は、外形形状を略長方形状とされて、二つ折りされて短手方向側の縁部相互を結合させることにより、取付部58を構成することとなる。 The shoulder restraint panels 67L, 67R constituting each of the shoulder restraints 50L, 50R have a substantially rectangular outer shape in which the inner walls 51L, 51R and the outer walls 52L, 52R are connected to each other at their rear edges. The shoulder restraint parts 50L and 50R are constructed by folding the belt in half and joining the peripheral edges to each other. The conduit section panels 69 and 70 constituting the conduit section 55 are composed of two panels having the same external shape. The mounting part panel 72 constituting the mounting part 58 has a substantially rectangular outer shape, is folded in half, and the edges on the short side are joined together to form the mounting part 58. .

実施形態の乗員保護装置Sでは、車両に搭載されたシート1にシートベルト7を装着しつつ乗員MPが着座した状態で、インフレーター17が作動すれば、インフレーター17から吐出される膨張用ガスが、導管部55を経てバッグ本体26内に流入することとなり、バッグ本体26が、カバー22を破断させるようにして、ラップベルト10から前上方に突出しつつ、図3の二点鎖線及び図9~11に示すように、膨張を完了させることとなる。 In the occupant protection device S of the embodiment, when the inflator 17 is operated while the occupant MP is seated on the seat 1 mounted on the vehicle with the seat belt 7 attached, the inflation gas discharged from the inflator 17 is It flows into the bag body 26 through the conduit portion 55, and the bag body 26 breaks the cover 22 and protrudes forward and upward from the lap belt 10, along the chain double-dashed line in FIG. 3 and in FIGS. 9 to 11. The expansion is completed as shown in .

そして、実施形態の乗員保護装置Sでは、エアバッグ25の膨張完了時において、乗員MPが上半身MUを下半身MDに近づけるように移動する際に、まず、左右の肩MSL,MSRの前方に配置される2つの肩拘束部50L,50Rが、乗員MPの左右の肩MSL,MSRを拘束して、上半身MUの前方移動を抑制することとなる。すなわち、実施形態の乗員保護装置Sでは、肩拘束部50L,50Rによって、胸部MBに比べて高い反力で拘束可能な左右の肩MSL,MSRを受け止めることにより、上半身MUの前方移動する運動エネルギーを吸収できることから、膨張を完了させたエアバッグ25により、乗員MPの上半身MUの前傾移動を規制することができる。そして、実施形態の乗員保護装置Sでは、膨張完了時のエアバッグ25の下端28b側に、肩拘束部50L,50Rを支持して、乗員MPの左右の大腿部MTL,MTRの上面を覆う支持膨張部38が、配設される構成であり、この支持膨張部38は、下面38a側に配設される被支持面39により、広い面積で左右の大腿部MTL,MTRに支持されることとなる。そのため、乗員MPが、肩拘束部50L,50Rによって左右の肩MSL,MSRを拘束されつつ上半身MUをさらに下半身MDに近づけるように移動することとなっても、支持膨張部38によって肩拘束部50L,50Rの下方を安定して支持させることができて、肩拘束部50L,50Rによる左右の肩MSL、MSRの拘束を安定させることができ、乗員MPの上半身MUをソフトで、かつ、的確に拘束することができる。 In the occupant protection device S of the embodiment, when the airbag 25 is fully inflated, when the occupant MP moves the upper body MU closer to the lower body MD, the occupant protection device S is first placed in front of the left and right shoulders MSL and MSR. The two shoulder restraint parts 50L and 50R restrain the left and right shoulders MSL and MSR of the occupant MP, thereby suppressing forward movement of the upper body MU. That is, in the occupant protection device S of the embodiment, the shoulder restraint parts 50L and 50R absorb the kinetic energy of the forward movement of the upper body MU by receiving the left and right shoulders MSL and MSR, which can be restrained with a higher reaction force than the chest MB. Therefore, the fully inflated airbag 25 can restrict the forward leaning movement of the upper body MU of the occupant MP. In the occupant protection device S of the embodiment, the shoulder restraint parts 50L and 50R are supported on the lower end 28b side of the airbag 25 when inflation is completed, and cover the upper surfaces of the left and right thighs MTL and MTR of the occupant MP. A support expansion part 38 is provided, and this support expansion part 38 is supported over a wide area by the left and right thighs MTL and MTR by a supported surface 39 provided on the lower surface 38a side. That will happen. Therefore, even if the occupant MP moves to bring the upper body MU closer to the lower body MD while the left and right shoulders MSL and MSR are restrained by the shoulder restraint parts 50L and 50R, the shoulder restraint part 50L is controlled by the support expansion part 38. , 50R can be stably supported, the left and right shoulders MSL and MSR can be stably restrained by the shoulder restraint parts 50L and 50R, and the upper body MU of the occupant MP can be supported softly and accurately. can be restrained.

したがって、実施形態の乗員保護装置Sでは、乗員MPの上半身MUを、ソフトで、かつ、的確に拘束することができる。 Therefore, in the occupant protection device S of the embodiment, the upper body MU of the occupant MP can be restrained softly and accurately.

また、実施形態の乗員保護装置Sでは、エアバッグ25が、支持膨張部38の上方となる領域に、膨張完了時の後端側において上下方向に略沿って延びる胸部受止面43を配設させるとともに、胸部受止面43の上方となる膨張完了時の上端28a側に頭部保護部41を配設させる構成とされている。そのため、実施形態の乗員保護装置Sでは、乗員MPは、肩拘束部50L,50Rによって左右の肩MSL、MSRを拘束された状態で、膨張完了時の上端28a側に形成される頭部保護部41によって頭部MHを受け止められ、その後、胸部受止面43によって、胸部MBを受け止められることから、左右の肩MSL,MSRだけではなく、乗員MPの頭部MHと胸部MBも、エアバッグ25により、直接受け止めて保護することができる。具体的には、実施形態の乗員保護装置Sでは、肩拘束部50L,50Rは、膨張完了時に、本体膨張部28の後上壁部30(胸部受止面43)から大きく後方に張り出して、後端50bを乗員MPの左右の肩MSL,MSRの前側に近接して配置させるように形成されており、本体膨張部28は、上端28a側に配置される頭部保護部41を、シート1に着座している乗員MPの頭部MHの前下方に位置させるように、構成されている。また、肩拘束部50L,50Rは、上下に幅広の板状として、肩MSL,MSRから連なる上腕AL,ARの前側を覆い可能に、配置される構成である。そのため、実施形態の乗員保護装置Sでは、エアバッグ25の膨張初期に、まず、肩拘束部50L,50Rが、上下に広い範囲で、肩MSL,MSRを迅速に受け止めることができ、肩MSL,MSRの前側を上下に広い範囲で押えることができることから、乗員MPのシート1に対する前方移動を、的確に規制することができる。そして、上半身MUを下半身MDに近づけるように前傾移動する際には、上半身MUが、この肩拘束部50L,50Rを圧縮変形させるような態様となって、肩拘束部50L,50Rによって、前傾移動しようとする乗員MPの上半身MUの運動エネルギーを、的確にエネルギー吸収することができる。そして、運動エネルギーを吸収されつつ、前傾移動する上半身MUに伴って、前下方に移動する頭部MHを、頭部保護部41によって受け止めることができ、その後、胸部MBが、胸部受止面43に受け止められることとなる。 Further, in the occupant protection device S of the embodiment, the airbag 25 is provided with a chest receiving surface 43 extending substantially along the vertical direction on the rear end side when inflation is completed in a region above the support inflation part 38. At the same time, the head protection part 41 is disposed above the chest receiving surface 43 on the upper end 28a side when inflation is completed. Therefore, in the occupant protection device S of the embodiment, the occupant MP has the left and right shoulders MSL and MSR restrained by the shoulder restraint parts 50L and 50R, and the head protection part formed on the upper end 28a side when the inflation is completed. 41 receives the head MH, and then the chest receiving surface 43 receives the chest MB. This allows it to be directly received and protected. Specifically, in the occupant protection device S of the embodiment, the shoulder restraint parts 50L and 50R protrude significantly rearward from the rear upper wall part 30 (chest receiving surface 43) of the main body inflation part 28 when inflation is completed. The rear end 50b is formed so as to be disposed close to the front side of the left and right shoulders MSL, MSR of the occupant MP, and the main body inflatable portion 28 extends the head protection portion 41 disposed on the upper end 28a side from the seat 1. The head MH is configured to be located below and in front of the head MH of the occupant MP seated in the vehicle. Further, the shoulder restraint parts 50L and 50R are vertically wide plate-shaped and are arranged so as to cover the front sides of the upper arms AL and AR extending from the shoulders MSL and MSR. Therefore, in the occupant protection device S of the embodiment, at the initial stage of inflation of the airbag 25, the shoulder restraint parts 50L, 50R can quickly catch the shoulders MSL, MSR in a wide vertical range, and the shoulder restraint parts 50L, 50R can quickly catch the shoulders MSL, Since the front side of the MSR can be pressed down over a wide range vertically, forward movement of the occupant MP relative to the seat 1 can be accurately restricted. When the upper body MU moves forward so as to approach the lower body MD, the upper body MU compresses and deforms the shoulder restraint parts 50L and 50R, and the shoulder restraint parts 50L and 50R move forward. It is possible to accurately absorb the kinetic energy of the upper body MU of the occupant MP who is attempting to tilt. Then, the head MH, which moves forward and downward as the upper body MU moves forward while absorbing kinetic energy, can be received by the head protection part 41, and then the chest MB is moved to the chest receiving surface. 43 will be accepted.

さらに、実施形態の乗員保護装置Sでは、胸部受止面43(後上壁部30)が、エアバッグ25の内部に配設される規制テザー45によって、エアバッグ25の膨張完了時に、後方への突出を規制される構成であることから、膨張完了時に胸部受止面43が過度に後方に突出して配置されることを抑制でき、換言すれば、実際に乗員MPの肩MSL,MSRと接触する肩拘束部50L,50Rの後端50bと、胸部受止面43と、の前後方向側での離隔距離を安定して維持させることができて、肩拘束部50L,50Rによる肩拘束後に、胸部受止面43によって、安定して乗員MPの胸部MBをソフトに保護することができる。特に、実施形態では、エアバッグ25の膨張完了時に、胸部受止面43(後上壁部30)が、規制テザー45との連結部位46R周囲の部位(胸部受止面43における上下左右の中央付近の領域)に、前方に向かって凹む凹部43aを有する構成であることから、この凹部43aの周縁を構成する略長円形の曲面状の周縁領域43bによって、胸部MBを広く受け止めることができて、上下左右の中央付近を前方に向かって凹ませている胸部受止面43により、乗員MPの胸部MBを一層ソフトに保護することができる。 Further, in the occupant protection device S of the embodiment, the chest receiving surface 43 (rear upper wall portion 30) is moved rearward by the restriction tether 45 disposed inside the airbag 25 when the airbag 25 completes inflation. Since the structure restricts the protrusion of the chest receiving surface 43, it is possible to prevent the chest receiving surface 43 from protruding excessively rearward when the inflation is completed.In other words, it actually comes into contact with the shoulders MSL and MSR of the occupant MP. The distance between the rear end 50b of the shoulder restraint parts 50L, 50R and the chest receiving surface 43 in the front-back direction can be maintained stably, and after the shoulder restraint parts 50L, 50R restrain the shoulder, The chest receiving surface 43 can stably and softly protect the chest MB of the occupant MP. In particular, in the embodiment, when the airbag 25 is fully inflated, the chest receiving surface 43 (rear upper wall portion 30) is connected to the region around the connecting portion 46R with the restriction tether 45 (the center of the chest receiving surface 43 in the vertical and horizontal directions). Since the structure has a concave portion 43a that is recessed toward the front in the area (nearby area), the chest MB can be widely received by the approximately oval curved peripheral area 43b that constitutes the periphery of the concave portion 43a. The chest receiving surface 43, which is recessed toward the front in the vicinity of the vertical and horizontal centers, allows the chest MB of the occupant MP to be more softly protected.

さらにまた、実施形態の乗員保護装置Sでは、エアバッグ25を保持する保持体が、シートベルト7において装着時に乗員MPの腰部MWを拘束するラップベルト10から、構成されていることから、エアバッグを保持するための保持体を別途設けなくともよく、構成部品の増大を抑制できる。なお、このような点を考慮しなければ、図13,14に示すごとく、シートベルトとは別体として、装着時に乗員MPの腰部MWの前方に配置される保持体75に、エアバッグ25を保持させる構成としてもよい。図13,14に示す保持体75は、形状保持性を有した材料からなってエアバッグ25を保持する保持体本体76と、保持体本体76と折り畳まれたエアバッグ25との周囲を覆うカバー体77と、を備えるもので、シート1に対して回動可能に、座部3の左端側でシート1に連結され、右端をバックル(図符号省略)を利用して連結させることにより、シート1に着座した乗員MPの腰部MWの周囲を囲むように装着される構成である。また、この保持体75は、装着時に、乗員MPの腰部MWとの間に、隙間を設けるように構成され、エアバッグ25は、保持体75と腰部MWとの間の隙間を埋めつつ、乗員MPの上半身MUの前方を覆うように膨張する構成とされている(図14参照)。 Furthermore, in the occupant protection device S of the embodiment, the holder for holding the airbag 25 is configured from the lap belt 10 that restrains the waist MW of the occupant MP when worn on the seatbelt 7. There is no need to separately provide a holder for holding the holder, and an increase in the number of component parts can be suppressed. If these points are not taken into account, the airbag 25 will not be attached to the holder 75, which is placed in front of the waist MW of the occupant MP when worn, as a separate body from the seatbelt, as shown in FIGS. 13 and 14. It may also be configured to be held. The holder 75 shown in FIGS. 13 and 14 includes a holder main body 76 that is made of a shape-retentive material and holds the airbag 25, and a cover that covers the periphery of the holder main body 76 and the folded airbag 25. The body 77 is rotatably connected to the seat 1 at the left end side of the seat part 3, and the right end is connected using a buckle (not shown in the figure), so that the seat can be rotated with respect to the seat 1. It is configured to be worn so as to surround the waist MW of a passenger MP seated on a passenger seat 1. Further, this holding body 75 is configured to provide a gap between the occupant MP's lower back MW when worn, and the airbag 25 fills the gap between the holding body 75 and the lower back MW while allowing the occupant It is configured to expand to cover the front of MP's upper body MU (see FIG. 14).

また、エアバッグ80としては、図15~19に示す構成のものを使用してもよい。エアバッグ80は、ポリエステル糸やポリアミド糸等からなる可撓性を有した織布から形成されるもので、バッグ本体81と、バッグ本体81の膨張完了形状を規制する拡開抑制手段としてのテザー92L,92Rと、インフレーター17と接続される導管部55と、バッグ本体81をラップベルト10に取り付けるための取付部58と、を備えている。導管部55及び取付部58は、前述のエアバッグ25における導管部55及び取付部58と同一の構成であることから、同一の図符号を付して詳細な説明を省略する。 Furthermore, as the airbag 80, those having the configurations shown in FIGS. 15 to 19 may be used. The airbag 80 is formed from a flexible woven fabric made of polyester yarn, polyamide yarn, etc., and includes a bag body 81 and a tether serving as an expansion suppressing means to restrict the shape of the bag body 81 when it is fully inflated. 92L, 92R, a conduit portion 55 connected to the inflator 17, and an attachment portion 58 for attaching the bag body 81 to the lap belt 10. Since the conduit part 55 and the attachment part 58 have the same configuration as the conduit part 55 and the attachment part 58 in the airbag 25 described above, they will be given the same reference numerals and a detailed explanation will be omitted.

バッグ本体81は、図15,16に示すように、支持膨張部83と、支持膨張部83の前端83b側から延びる前側膨張部87と、を備えている。 As shown in FIGS. 15 and 16, the bag body 81 includes a support inflation section 83 and a front inflation section 87 extending from the front end 83b side of the support inflation section 83.

支持膨張部83は、膨張完了時に、乗員MPの左右の大腿部MTL,MTRの上面側を覆うように前後方向に略沿って延びるような略板状として構成されている。支持膨張部83は、膨張完了形状を略長方形板状として、後端83cを、シート1に着座した乗員MPの腹部MAの前方に位置させるように、構成されている(図18参照)。詳細には、支持膨張部83は、膨張完了時における左右方向側の幅寸法を、大腿部MTL,MTRよりも左右に幅広として、大腿部MTL,MTRの上面を左右の全域にわたって略全面にわたって覆い可能な寸法に、設定され、前後方向側の幅寸法を、大腿部MTL,MTRの上面を、膝の近傍まで前後に広く覆い可能な寸法に、設定されている。支持膨張部83の下面83aを構成している下壁部84は、乗員受止時に、乗員MPの左右の大腿部MTL,MTRにより支持される被支持面85を、構成している。また、支持膨張部83の後端83c側の下面側には、図16に示すように、導管部55が連通される構成であり、下壁部84の後端近傍には、導管部55と連通される連通孔(図符号省略)が、形成されている。 The support inflation portion 83 is configured to have a substantially plate-like shape that extends substantially along the front-rear direction so as to cover the upper surface sides of the left and right thighs MTL and MTR of the occupant MP when inflation is completed. The support inflation portion 83 is configured to have a substantially rectangular plate shape when fully inflated, and the rear end 83c is located in front of the abdomen MA of the occupant MP seated on the seat 1 (see FIG. 18). Specifically, the support inflation portion 83 has a width dimension in the left and right direction at the time of completion of inflation that is wider in the left and right directions than the thighs MTL and MTR, so that the upper surface of the thighs MTL and MTR is covered almost entirely over the entire left and right area. The width dimension in the anteroposterior direction is set to a dimension that allows the upper surfaces of the thighs MTL and MTR to be widely covered in the front and rear directions up to the vicinity of the knees. The lower wall portion 84 that constitutes the lower surface 83a of the support expansion portion 83 constitutes a supported surface 85 that is supported by the left and right thighs MTL and MTR of the occupant MP when the occupant is received. Further, as shown in FIG. 16, a conduit portion 55 is connected to the lower surface side of the rear end 83c of the support expansion portion 83, and a conduit portion 55 is connected to the lower surface of the support expansion portion 83 near the rear end. A communicating hole (numerical symbol omitted) is formed.

前側膨張部87は、膨張完了時に、支持膨張部83の前端83b側から後上側に向かって延びるような略板状として、左右方向側から見た状態で後上がりに傾斜して配置されている。前側膨張部87は、支持膨張部83から連なるように形成されて、膨張完了形状を略長方形板状とされるもので、左右方向側の幅寸法を、支持膨張部83の左右方向の幅寸法と略同一として構成されている。前側膨張部87は、膨張完了時の後端側部位88を、シート1に着座した乗員MPの左右の肩MS(MSL,MSR)の前方に配置させるように、構成されている(図18参照)。また、前側膨張部87は、後端側部位88を、支持膨張部83の後端83cの略直上に位置させるように、構成されている。そして、実施形態のエアバッグ80では、この前側膨張部87の後端側部位88が、乗員MPの左右の肩MSL,MSRを拘束可能な肩拘束部89を、構成している。すなわち、このエアバッグ80では、肩拘束部89は、前側膨張部87の前端87a側を介して、支持膨張部83により支持される構成である。後端側部位88(肩拘束部89)は、エアバッグ80の膨張完了時に、乗員MPの左右の肩MSL,MSRよりもわずかに左右の外方に突出するように配置されている。また、肩拘束部89を構成する後端側部位88は、肩MSL,MSRを受け止める後面88aを、上下に略沿わせて、肩MSL,MSRを上下で広く覆うように、構成されている。実施形態のバッグ本体81では、支持膨張部83と前側膨張部87とは、膨張完了時の厚さを同程度として、構成されている。 The front inflatable part 87 has a substantially plate shape that extends from the front end 83b side of the support inflatable part 83 toward the rear upper side when the inflation is completed, and is arranged so as to be inclined upward toward the rear when viewed from the left and right sides. . The front inflatable part 87 is formed so as to be continuous with the support inflatable part 83 and has a substantially rectangular plate shape when fully inflated. It is configured almost the same as . The front inflation portion 87 is configured such that the rear end portion 88 when inflation is completed is located in front of the left and right shoulders MS (MSL, MSR) of the occupant MP seated on the seat 1 (see FIG. 18). ). Further, the front inflatable portion 87 is configured such that the rear end portion 88 is positioned substantially directly above the rear end 83c of the support inflatable portion 83. In the airbag 80 of the embodiment, the rear end portion 88 of the front inflatable portion 87 constitutes a shoulder restraining portion 89 capable of restraining the left and right shoulders MSL and MSR of the occupant MP. That is, in this airbag 80, the shoulder restraint part 89 is supported by the support inflation part 83 via the front end 87a side of the front inflation part 87. The rear end portion 88 (shoulder restraint portion 89) is arranged so as to protrude slightly outward from the left and right sides than the left and right shoulders MSL and MSR of the occupant MP when the airbag 80 is fully inflated. Further, the rear end portion 88 constituting the shoulder restraining portion 89 is configured such that the rear surface 88a that receives the shoulders MSL and MSR is substantially aligned vertically, so as to broadly cover the shoulders MSL and MSR from above and below. In the bag main body 81 of the embodiment, the support inflation section 83 and the front inflation section 87 are configured to have approximately the same thickness upon completion of inflation.

バッグ本体81の膨張完了形状を規制する拡開抑制手段としてのテザー92L,92Rは、図15に示すように、バッグ本体81の左縁81a側と右縁81b側とにおいて、それぞれ、支持膨張部83と前側膨張部87とを連結するように、配置されている。各テザー92L,92Rは、前側膨張部87の後端側部位88付近と支持膨張部83の後端83c付近を含めて、前後に広く支持膨張部83と前側膨張部87とを連結するような帯状として、上下方向に略沿うように配設されるもので、膨張完了時の前側膨張部87の後端側部位88を、支持膨張部83側から離隔させるような拡開を抑制する構成とされている。 As shown in FIG. 15, the tethers 92L and 92R, which serve as expansion suppressing means for regulating the fully inflated shape of the bag body 81, are attached to the support inflation portions on the left edge 81a side and the right edge 81b side of the bag body 81, respectively. 83 and the front expansion portion 87 are connected to each other. Each tether 92L, 92R connects the support inflatable part 83 and the front inflatable part 87 widely in the front and back, including the vicinity of the rear end side part 88 of the front inflatable part 87 and the vicinity of the rear end 83c of the support inflatable part 83. It is arranged in a band shape and substantially along the vertical direction, and has a configuration that suppresses expansion that would separate the rear end side part 88 of the front side inflatable part 87 from the support inflatable part 83 side when the inflation is completed. has been done.

このような構成のエアバッグ80では、前側膨張部87の後端側の領域(後端側部位88)から構成される肩拘束部89が、図17,19に示すように、シート1に着座した乗員MPの左右の肩MSL,MSRの前方において左右方向に略沿って配置されることから、エアバッグ80が、乗員MPに対して多少左右でずれた位置で膨張することとなっても、肩拘束部89によって、左右の肩MSL,MSRを安定して拘束することができる。 In the airbag 80 having such a configuration, the shoulder restraining portion 89 constituted by the rear end side region (rear end side portion 88) of the front inflatable portion 87 is configured to prevent the shoulder restraint portion 89 from being seated on the seat 1, as shown in FIGS. 17 and 19. Since the airbag 80 is disposed approximately in the left-right direction in front of the left and right shoulders MSL and MSR of the occupant MP, even if the airbag 80 is inflated at a position that is slightly shifted left and right relative to the occupant MP, The shoulder restraining portion 89 can stably restrain the left and right shoulders MSL and MSR.

また、上記構成のエアバッグ80では、膨張完了時の前側膨張部87の後端側部位88を支持膨張部83側から離隔させるような拡開を抑制可能な拡開抑制手段としてのテザー92L,92Rが、配設される構成であることから、前側膨張部87の支持膨張部83に対する位置を安定させることができ、換言すれば、肩拘束部89の乗員MPに対する配置位置を、上方へずらすことなく、安定させることができる。実施形態のエアバッグ80では、拡開抑制手段として、バッグ本体81と別体のテザー92L,92Rを、バッグ本体81の左縁81a側と右縁81b側とに配設させているが、テザーを配設させず、例えば、図20に示すエアバッグ80Aのごとく、前側膨張部87Aにおける支持膨張部83Aと連結される前端87a側を、厚肉として、この厚肉膨張部位95を拡開抑制手段とし、前側膨張部87Aの位置を規制(後端側部位88Aの支持膨張部83A側からの離隔を抑制)するように、構成してもよい。なお、製造が容易であり、かつ、的確に拡開を規制できる見地からは、拡開抑制手段として、実施形態のエアバッグ80のごとく、バッグ本体81と別体のテザー92L,92Rを配設させる構成とすることが好ましい。 In the airbag 80 having the above configuration, the tether 92L serves as an expansion suppressing means capable of suppressing expansion that would separate the rear end portion 88 of the front inflatable portion 87 from the support inflatable portion 83 side when inflation is completed; 92R is arranged, the position of the front side inflatable part 87 relative to the support inflatable part 83 can be stabilized. In other words, the position of the shoulder restraint part 89 relative to the occupant MP can be shifted upward. It can be stabilized without any In the airbag 80 of the embodiment, tethers 92L and 92R, which are separate from the bag body 81, are disposed on the left edge 81a side and the right edge 81b side of the bag body 81 as expansion suppressing means. For example, as in the airbag 80A shown in FIG. 20, the front end 87a side of the front inflatable part 87A connected to the support inflatable part 83A is thickened to prevent expansion of the thick inflatable part 95. It may be configured to restrict the position of the front inflatable portion 87A (suppress the separation of the rear end portion 88A from the support inflatable portion 83A side). In addition, from the viewpoint of easy manufacturing and accurate control of expansion, tethers 92L and 92R, which are separate from the bag body 81, are provided as expansion suppressing means, as in the airbag 80 of the embodiment. It is preferable to have a configuration that allows

さらに、エアバッグ100として、図21~26に示すような構成のものを使用してもよい。エアバッグ100は、ポリエステル糸やポリアミド糸等からなる可撓性を有した織布から形成されるもので、バッグ本体101と、バッグ本体101の膨張完了形状を規制するテザー111と、インフレーター17と接続される導管部55と、バッグ本体101をラップベルト10に取り付けるための取付部58と、を備えている。導管部55及び取付部58は、前述のエアバッグ25における導管部55及び取付部58と同一の構成であることから、同一の図符号を付して詳細な説明を省略する。 Furthermore, as the airbag 100, those having configurations as shown in FIGS. 21 to 26 may be used. The airbag 100 is formed from a flexible woven fabric made of polyester yarn, polyamide yarn, etc., and includes a bag body 101, a tether 111 that regulates the fully inflated shape of the bag body 101, and an inflator 17. It includes a conduit portion 55 to be connected, and an attachment portion 58 for attaching the bag body 101 to the lap belt 10. Since the conduit part 55 and the attachment part 58 have the same configuration as the conduit part 55 and the attachment part 58 in the airbag 25 described above, they will be given the same reference numerals and a detailed explanation will be omitted.

バッグ本体101は、図21~23に示すように、支持膨張部103と、支持膨張部103の左端103a,右端103b近傍においてそれぞれ上方に延びるように形成される2つの肩拘束部108L,108Rと、を備えている。 As shown in FIGS. 21 to 23, the bag body 101 includes a support inflatable part 103 and two shoulder restraint parts 108L and 108R formed to extend upward near the left end 103a and right end 103b of the support inflatable part 103, respectively. , is equipped with.

支持膨張部103は、前述のエアバッグ80における支持膨張部83と同様に、膨張完了時に、乗員MPの左右の大腿部MTL,MTRの上面側を覆うように前後方向に略沿って延びるような略板状として構成されている。支持膨張部103は、膨張完了形状を略長方形板状として、後端103cを、シート1に着座した乗員MPの腹部MAの前方に位置させるように、構成されている(図25参照)。詳細には、支持膨張部103は、膨張完了時における左右方向側の幅寸法を、大腿部MTL,MTRよりも左右に幅広として、大腿部MTL,MTRの上面を左右の全域にわたって略全面にわたって覆い可能な寸法に、設定され、前後方向側の幅寸法を、大腿部MTL,MTRの上面を、膝の近傍まで前後に広く覆い可能な寸法に、設定されている。支持膨張部103の下面103eを構成している下壁部105は、乗員受止時に、乗員MPの左右の大腿部MTL,MTRにより支持される被支持面106を、構成している。また、支持膨張部103の後端103c側の下面側には、図22に示すように、導管部55が連通される構成であり、下壁部105の後端近傍には、導管部55と連通される連通孔(図符号省略)が、形成されている。 Like the support inflation part 83 of the airbag 80 described above, the support inflation part 103 extends substantially along the front-rear direction so as to cover the upper surface side of the left and right thighs MTL and MTR of the occupant MP when inflation is completed. It is constructed as a roughly plate-like structure. The support inflation portion 103 is configured to have a substantially rectangular plate shape when fully inflated, and the rear end 103c is located in front of the abdomen MA of the occupant MP seated on the seat 1 (see FIG. 25). Specifically, the support inflation section 103 has a width dimension in the left and right direction at the time of completion of inflation that is wider in the left and right directions than the thighs MTL and MTR, so that the upper surface of the thighs MTL and MTR is covered almost entirely over the entire left and right area. The width dimension in the anteroposterior direction is set to a dimension that allows the upper surfaces of the thighs MTL and MTR to be widely covered in the front and rear directions up to the vicinity of the knees. The lower wall portion 105 that constitutes the lower surface 103e of the support expansion portion 103 constitutes a supported surface 106 that is supported by the left and right thighs MTL and MTR of the occupant MP when the occupant is received. Further, as shown in FIG. 22, a conduit portion 55 is connected to the lower surface side of the rear end 103c of the support expansion portion 103, and the conduit portion 55 and the conduit portion 55 are connected near the rear end of the lower wall portion 105. A communicating hole (numerical symbol omitted) is formed.

各肩拘束部108L,108Rは、図21,23に示すように、支持膨張部103の左端103a側と右端103b側とにおいて、それぞれ、支持膨張部103の上面103dから上方に延びるように、上下方向に略沿って形成されるもので、下端108b側を支持膨張部103と連通されている。各肩拘束部108L,108Rは、膨張完了形状を、前後方向に略沿うとともに、左右方向側から見て略三角形状の略板状とされている。具体的には、各肩拘束部108L,108Rは、下端108b側の前後方向側の幅寸法を、支持膨張部103の前後方向の幅寸法と略一致させるとともに、膨張完了時の後面108cを構成する後側壁部109を、支持膨張部103の上面103d(上壁部104)に対して略直交させるように、左右方向側から見た外形形状を、略直角三角形状とされている。そして、各肩拘束部108L,108Rは、後面108c側(後側壁部109)により、乗員MPの各肩MSL,MSRを拘束する構成である。また、各肩拘束部108L,108Rは、上下方向側の幅寸法を、膨張完了時における上端108aの位置を、頭部MHより下方であって、乗員MPの各肩MSL,MSRよりも上側に位置させるように、構成されている(図25参照)。実施形態のバッグ本体101では、支持膨張部103と各肩拘束部108L,108Rとは、膨張完了時の厚さを同程度として、構成されている。 As shown in FIGS. 21 and 23, the shoulder restraint parts 108L and 108R are arranged vertically and upwardly on the left end 103a side and the right end 103b side of the support inflatable part 103, respectively, so as to extend upward from the upper surface 103d of the support inflatable part 103. It is formed substantially along the direction, and the lower end 108b side is communicated with the support expansion part 103. Each of the shoulder restraining portions 108L, 108R has a fully inflated shape substantially along the front-rear direction, and has a substantially triangular plate shape when viewed from the left-right direction. Specifically, each of the shoulder restraint parts 108L and 108R has a width dimension in the front-rear direction on the lower end 108b side that substantially matches the width dimension in the front-rear direction of the support inflation part 103, and forms a rear surface 108c when inflation is completed. In order to make the rear wall portion 109 substantially orthogonal to the upper surface 103d (upper wall portion 104) of the support expansion portion 103, the outer shape when viewed from the left and right side is approximately a right triangular shape. The shoulder restraint parts 108L and 108R are configured to restrain the shoulders MSL and MSR of the occupant MP on the rear surface 108c side (rear side wall part 109). In addition, each shoulder restraint part 108L, 108R has a width dimension in the vertical direction such that the position of the upper end 108a at the time of completion of inflation is below the head MH and above each shoulder MSL, MSR of the occupant MP. (See FIG. 25). In the bag main body 101 of the embodiment, the support inflation part 103 and each of the shoulder restraint parts 108L and 108R are configured to have approximately the same thickness when fully inflated.

テザー111は、各肩拘束部108L,108Rの相互の離隔を規制するためのものであり、実施形態では、肩拘束部108L,108Rの後端(後面108c)側を相互に連結するように、配設されている(図21,22参照)。具体的には、テザー111は、肩拘束部108L,108Rの上下方向の中間部位において、左右方向に略沿うように配設されるとともに、端部111a,111b側を、それぞれ、肩拘束部108L,108Rの後端側(後側壁部109近傍となる位置)に連結させている。実施形態では、テザー111は、幅寸法を、肩拘束部108L,108Rの上下方向側の幅寸法の1/3程度に、設定されている。 The tether 111 is for regulating the separation of the shoulder restraint parts 108L and 108R from each other, and in the embodiment, the tether 111 is configured to connect the rear ends (rear surface 108c) of the shoulder restraint parts 108L and 108R to each other. (See Figures 21 and 22). Specifically, the tether 111 is disposed approximately along the left-right direction at an intermediate portion in the vertical direction of the shoulder restraint parts 108L and 108R, and the end parts 111a and 111b are connected to the shoulder restraint part 108L, respectively. , 108R (at a position near the rear wall portion 109). In the embodiment, the width of the tether 111 is set to about ⅓ of the vertical width of the shoulder restraining parts 108L and 108R.

このような構成のエアバッグ100では、図24~26に示すように、エアバッグ100の膨張完了時に、乗員MPの左右の肩MSL,MSRをそれぞれ拘束する肩拘束部108L,108Rが、乗員MPの前方において上下方向に略沿って配置されることから、体格が異なっていても(シート1に対する肩MSL,MSRの上下の位置が異なっていても)、乗員MPを、安定して保護することができる。 In the airbag 100 having such a configuration, as shown in FIGS. 24 to 26, when the airbag 100 is fully inflated, the shoulder restraining parts 108L and 108R restrain the left and right shoulders MSL and MSR of the occupant MP, respectively. Because it is arranged approximately along the vertical direction in front of the passenger MP, it is possible to stably protect the occupant MP even if the physique of the occupant is different (even if the vertical position of the shoulders MSL and MSR with respect to the seat 1 is different). Can be done.

また、上記構成のエアバッグ100では、肩拘束部108L,108Rを、相互の離隔を規制可能に、テザー111によって相互に連結させていることから、肩拘束部108L,108Rによって乗員MPの左右の肩MSL,MSRを受け止めた際に、肩拘束部108L,108Rが相互に離隔することを抑制できて、乗員MPの肩MSL,MSRを、的確に拘束することができる。 Furthermore, in the airbag 100 having the above configuration, the shoulder restraint parts 108L and 108R are connected to each other by the tether 111 so that the separation between them can be restricted. When the shoulders MSL and MSR are received, the shoulder restraint parts 108L and 108R can be prevented from separating from each other, and the shoulders MSL and MSR of the occupant MP can be restrained accurately.

また、エアバッグ100Aとして、図27,28に示すように、テザーの代わりに、肩拘束部108AL,108ARを、連通膨張部113により連通させて、肩拘束部108AL,108AR間の相互の離隔を規制する構成としてもよい。このエアバッグ100Aでは、テザーの代わりに連通膨張部113を配設させる以外は、上述のエアバッグと同一の構成であることから、同一の部材には、同一の図符号の末尾に「A」を付して、詳細な説明を省略する。 In addition, as shown in FIGS. 27 and 28, the airbag 100A has the shoulder restraint parts 108AL and 108AR communicated with each other through the communication expansion part 113 instead of the tether to reduce the mutual separation between the shoulder restraint parts 108AL and 108AR. It may also be configured to regulate. This airbag 100A has the same configuration as the above-mentioned airbag except that a communicating inflatable portion 113 is provided instead of the tether, so the same members are designated by the same reference numerals with "A" at the end. , and detailed explanation will be omitted.

連通膨張部113は、実施形態の場合、肩拘束部108AL,108ARにおける前後の略中央で、上下の中央よりやや上方となる位置において、膨張完了形状を略円柱状として軸方向を左右方向に略沿わせるように配設されるもので、端部113a,113bを、それぞれ、各肩拘束部108AL,108ARにおいて、左右の内方に配置される内壁部110に、連結させるようにして、肩拘束部108AL,108ARを相互に連通させている。実施形態では、連通膨張部113は、外径寸法を、肩拘束部108AL,108ARの厚さ寸法の2/3程度として、構成されている。 In the case of the embodiment, the communicating inflatable part 113 has a substantially cylindrical inflated shape in the axial direction at a position slightly above the vertical center of the shoulder restraining parts 108AL and 108AR, and is located at a position slightly above the vertical center. The end portions 113a and 113b are connected to the inner wall portions 110 disposed inwardly on the left and right sides of the shoulder restraint portions 108AL and 108AR, respectively. The sections 108AL and 108AR are communicated with each other. In the embodiment, the communication expansion portion 113 is configured to have an outer diameter approximately 2/3 of the thickness of the shoulder restraint portions 108AL and 108AR.

エアバッグ100Aをこのような構成とする場合、膨張した連通膨張部113は、所定長さの略円柱状の外形形状を維持しようとして、前述のエアバッグ100において使用されるテザー111と比較して剛性が高いことから、エアバッグ100Aの膨張完了時の形状保持性を向上させることができて、肩を受け止めた際の肩拘束部108AL,108ARの大きな変形、換言すれば、肩拘束部108AL,108ARの相互の離隔や接近を、抑制でき、乗員の肩を、一層的確に拘束することができる。 When the airbag 100A has such a configuration, the inflated communication inflation portion 113 attempts to maintain a substantially cylindrical external shape with a predetermined length, and has a larger diameter than the tether 111 used in the airbag 100 described above. Since the rigidity is high, it is possible to improve the shape retention property when the airbag 100A is fully inflated, and the shoulder restraint parts 108AL, 108AR can be greatly deformed when the shoulder is received, in other words, the shoulder restraint parts 108AL, It is possible to suppress the 108ARs from moving away from or approaching each other, and the shoulders of the occupant can be restrained more accurately.

さらに、エアバッグ120として、図29~35に示すような構成のものを使用してもよい。エアバッグ120は、ポリエステル糸やポリアミド糸等からなる可撓性を有した織布から形成されるもので、バッグ本体121と、インフレーター17と接続される導管部55と、バッグ本体81をラップベルト10に取り付けるための取付部58と、を備えている。導管部55及び取付部58は、前述のエアバッグ25における導管部55及び取付部58と同一の構成であることから、同一の図符号を付して詳細な説明を省略する。 Furthermore, as the airbag 120, those having configurations as shown in FIGS. 29 to 35 may be used. The airbag 120 is formed from a flexible woven fabric made of polyester yarn, polyamide yarn, etc., and includes a bag body 121, a conduit portion 55 connected to the inflator 17, and a bag body 81 connected to a lap belt. 10. Since the conduit part 55 and the attachment part 58 have the same configuration as the conduit part 55 and the attachment part 58 in the airbag 25 described above, they will be given the same reference numerals and a detailed explanation will be omitted.

バッグ本体121は、膨張完了形状を、軸方向を左右方向に略沿わせた略三角柱状とされている(図29,30参照)。また、バッグ本体121は、前後方向側から見た状態での膨張完了形状を、左右に僅かに幅広とした略長方形状とするように、構成されている。そして、このバッグ本体121において、膨張完了時の下端121b側の領域が、膨張完了時に乗員MPの左右の大腿部MTL,MTRの上面を覆う支持膨張部130を、構成している。また、バッグ本体121において、膨張完了時の上端121a側における左右両端側の部位が、乗員MPの左右の肩MSL,MSRを拘束する肩拘束部133L,133Rを、構成している。詳細には、バッグ本体121は、膨張完了時に乗員MPから離れた前側に配置される前壁部122と、乗員MP側に配置される後上壁部123及び後下壁部124と、膨張完了時に左右方向側で対向して配置される左壁部125及び右壁部126と、を備える構成として、後上壁部123と後下壁部124とを略直交させるように、構成されている。後下壁部124は、エアバッグ120の膨張完了時に、乗員MPの大腿部MTL,MTRに略沿うように、前後方向に略沿って配設される構成である(図34参照)。後下壁部124は、支持膨張部130の下面を構成するもので、換言すれば、後下壁部124は、乗員受止時に乗員MPの左右の大腿部MTL,MTRにより支持される被支持面131を、構成している。バッグ本体121における後下壁部124の後端の下面側には、図30,31に示すように、導管部55が連通される構成であり、後下壁部124の後端近傍には、導管部55と連通される連通孔(図符号省略)が、形成されている。 The bag body 121 has an approximately triangular prism shape in which the axial direction is substantially parallel to the left-right direction (see FIGS. 29 and 30). Further, the bag main body 121 is configured so that the fully inflated shape when viewed from the front and back direction is a substantially rectangular shape that is slightly wider in the left and right directions. In the bag main body 121, a region on the lower end 121b side when the inflation is completed constitutes a support inflation section 130 that covers the upper surfaces of the left and right thighs MTL and MTR of the occupant MP when the inflation is completed. Further, in the bag main body 121, the left and right end portions on the upper end 121a side when the inflation is completed constitute shoulder restraining portions 133L and 133R that restrain the left and right shoulders MSL and MSR of the occupant MP. Specifically, the bag main body 121 includes a front wall portion 122 disposed on the front side away from the occupant MP when inflation is completed, a rear upper wall portion 123 and a rear lower wall portion 124 disposed on the occupant MP side, and The left wall part 125 and the right wall part 126 are sometimes arranged to face each other in the left-right direction. . The rear lower wall portion 124 is configured to be disposed approximately along the front-rear direction so as to approximately follow the thighs MTL and MTR of the occupant MP when the airbag 120 is fully inflated (see FIG. 34). The rear lower wall portion 124 constitutes the lower surface of the support expansion portion 130. In other words, the rear lower wall portion 124 constitutes the lower surface of the support expansion portion 130. In other words, the rear lower wall portion 124 serves as a support member supported by the left and right thighs MTL and MTR of the occupant MP when the occupant is received. A support surface 131 is configured. As shown in FIGS. 30 and 31, a conduit portion 55 is connected to the lower surface side of the rear end of the rear lower wall portion 124 in the bag body 121, and near the rear end of the rear lower wall portion 124, A communication hole (not shown in the figure) communicating with the conduit portion 55 is formed.

実施形態のバッグ本体121において、肩拘束部133L,133R間となる上端121a側の領域の左右の中央側には、図29,30に示すように、この上端121a側の左右の中央側の領域の後面側を、相対的に前方に凹ませるような凹部135が、形成されている。凹部135は、実施形態の場合、バッグ本体121の上端121aから、上下の中央よりやや下方となる領域まで形成されるもので、上端側の凹み量を最も大きくして、下側にかけて凹みを収束させるように、構成されている。すなわち、凹部135の凹みの底を形成している中央側部136は、上側を前方に位置させるように、後上壁部123に対して傾斜するように構成されている(図30参照)。そして、実施形態のバッグ本体121では、凹部135の左右両側において、凹部135に対して相対的に後方に突出するように配設されている部位が、肩拘束部133L,133Rを構成しており、すなわち、肩拘束部133L,133Rは、上下方向に略沿って配置されることとなる。このエアバッグ120では、バッグ本体121の上端121a側の領域(すなわち、肩拘束部133L,133Rの上端側の領域)によって、乗員MPの左右の肩MSL,MSRを拘束する構成であり、この肩拘束部133L,133Rによって肩MSL,MSRを拘束された状態で、凹部135の領域には、乗員MPの胸部MBが位置することとなる(図35参照)。そして、凹部135は、肩拘束部133L,133Rに対して相対的に前方に凹んでいることから、肩拘束部133L,133Rによって肩MSL,MSRを拘束された状態では、胸部MBは、バッグ本体121との接触を抑制されることとなる。 In the bag body 121 of the embodiment, as shown in FIGS. 29 and 30, there is a region on the left and right center sides of the upper end 121a side between the shoulder restraint parts 133L and 133R, as shown in FIGS. A recess 135 is formed on the rear side of the recess 135 so as to recess relatively forward. In the case of the embodiment, the recess 135 is formed from the upper end 121a of the bag body 121 to a region slightly below the vertical center, with the recess being the largest on the upper end and converging towards the bottom. It is configured so that That is, the center side part 136 forming the bottom of the recess 135 is configured to be inclined with respect to the rear upper wall part 123 so that the upper side is positioned forward (see FIG. 30). In the bag main body 121 of the embodiment, the portions disposed on both left and right sides of the recess 135 so as to protrude rearward relative to the recess 135 constitute shoulder restraint parts 133L and 133R. That is, the shoulder restraint parts 133L and 133R are arranged substantially along the up-down direction. This airbag 120 is configured to restrain the left and right shoulders MSL and MSR of the occupant MP by the region on the upper end 121a side of the bag body 121 (that is, the region on the upper end side of the shoulder restraint parts 133L and 133R). With the shoulders MSL and MSR restrained by the restraint parts 133L and 133R, the chest MB of the occupant MP is located in the region of the recess 135 (see FIG. 35). Since the recess 135 is recessed forward relative to the shoulder restraint parts 133L and 133R, when the shoulders MSL and MSR are restrained by the shoulder restraint parts 133L and 133R, the chest MB is Contact with 121 will be suppressed.

また、バッグ本体121において、支持膨張部130を構成する下端121b側の領域には、被支持面131を構成する後下壁部124から下方に突出する突出部140が、配設されている。この突出部140は、乗員MPの左右の大腿部MTL,MTR間に進入するように膨張して、エアバッグ120の膨張完了時に、左右の大腿部MTL,MTR間に配設される構成である(図30,31参照)。詳細には、突出部140は、実施形態の場合、略三角錐形状として、後下壁部124の左右の略中央となる位置において、断面略V字形状に突出するように形成されるもので、下方への突出量と左右の幅寸法とを、前端140a側でもっとも大きくして、後端140b側にかけて収束するように構成されている(図30,31参照)。詳細には、突出部140は、前端140a側における上下方向側の幅寸法を、大腿部MTL,MTRの上下の中央付近まで進入可能な寸法としている(図33,34参照)。また、突出部140は、前端140a側において、元部側(上端側)の左右方向側の幅寸法を、上下方向側の幅寸法よりもわずかに幅広として、構成されている。 Further, in the bag body 121, a protrusion 140 that protrudes downward from the rear lower wall portion 124 that constitutes the supported surface 131 is provided in a region on the lower end 121b side that constitutes the support expansion portion 130. This protrusion 140 is configured to inflate so as to enter between the left and right thighs MTL and MTR of the occupant MP, and is disposed between the left and right thighs MTL and MTR when the airbag 120 completes inflation. (See Figures 30 and 31). Specifically, in the case of the embodiment, the protrusion 140 is formed to have a substantially triangular pyramid shape and protrude at a position substantially in the left and right center of the rear lower wall portion 124 so as to have a substantially V-shaped cross section. , the downward protrusion amount and the left and right width dimensions are maximized on the front end 140a side and converge toward the rear end 140b side (see FIGS. 30 and 31). Specifically, the width of the protrusion 140 in the vertical direction on the front end 140a side is such that it can penetrate up to the vicinity of the upper and lower centers of the thighs MTL and MTR (see FIGS. 33 and 34). Further, the protruding portion 140 is configured such that, on the front end 140a side, the width dimension in the left-right direction on the base side (upper end side) is slightly wider than the width dimension in the vertical direction.

バッグ本体121は、膨張完了時の上下方向側の幅寸法及び左右方向側の幅寸法を、後上壁部123により、乗員MPの上半身MUを、頭部MHを除いて略全面にわたって覆い可能であり、かつ、膨張完了時における上端121aの位置を乗員MPの各肩MSL,MSRよりも上側に位置させるような寸法に、設定されている(図34参照)。また、バッグ本体121は、膨張完了時の前後方向側の幅寸法を、後下壁部124(被支持面131)により、大腿部MTL,MTRの上面を、膝の近傍まで前後に広く覆い可能な寸法に、設定されている(図34参照)。 The bag main body 121 can cover substantially the entire upper body MU of the occupant MP, except for the head MH, with the rear upper wall portion 123 in the vertical width dimension and the horizontal width dimension when the bag body 121 is fully inflated. The size is set such that the upper end 121a is located above each of the shoulders MSL and MSR of the occupant MP when the inflation is completed (see FIG. 34). In addition, the bag main body 121 has a width dimension in the front and rear direction when the inflation is completed, and the rear lower wall portion 124 (supported surface 131) covers the upper surfaces of the thighs MTL and MTR widely in the front and back up to the vicinity of the knees. The dimensions are set as possible (see FIG. 34).

このような構成のエアバッグ120では、支持膨張部130と肩拘束部133L,133Rとが、軸方向を左右方向に略沿わせた略三角柱状のバッグ本体121の一部から構成されており、換言すれば、支持膨張部130と肩拘束部133L,133Rとが、間に凹んだ領域を配置させず、連なるように一体的に構成されていることから、左右の肩MSL,MSRを受け止めた際の肩拘束部133L,133Rを、一層安定して支持膨張部130により支持させることが可能となり、乗員MPを安定して保護することができる。また、肩拘束部133L,133Rの間の領域には、凹部135が形成されて、相対的に前方に凹むように構成されていることから、乗員MPの胸部MBが、肩MSL,MSRを拘束される前に、エアバッグ120と接触することも、的確に抑制できる。 In the airbag 120 having such a configuration, the support inflation portion 130 and the shoulder restraint portions 133L, 133R are constituted by a part of the bag body 121 having a substantially triangular prism shape with the axial direction substantially parallel to the left-right direction. In other words, since the support expansion part 130 and the shoulder restraint parts 133L and 133R are integrally configured in a continuous manner without disposing a recessed area between them, the left and right shoulders MSL and MSR can be received. The shoulder restraint parts 133L and 133R can be more stably supported by the support expansion part 130, and the occupant MP can be stably protected. In addition, since a recess 135 is formed in the region between the shoulder restraint parts 133L and 133R and is configured to be relatively recessed forward, the chest MB of the occupant MP restrains the shoulders MSL and MSR. It is also possible to accurately prevent contact with the airbag 120 before the airbag 120 is released.

また、上記構成のエアバッグ120では、支持膨張部130に、被支持面131から下方に突出しつつ、乗員MPの左右の大腿部MTL,MTR間に進入するように膨張する突出部140が、形成されている。そのため、この突出部140を、大腿部MTL,MTR間に進入させるように膨張させることにより、エアバッグ120を、左右方向側の中央を、乗員MPの左右方向側の中央と略一致させるように、位置決めして膨張させることができる。なお、このような突出部140は、エアバッグ120に配置させて説明しているが、勿論、本発明の他の形態のエアバッグ25,80,80A,100,100Aに配設させる構成としてもよい。 Further, in the airbag 120 having the above configuration, the support inflation part 130 has a protrusion part 140 that protrudes downward from the supported surface 131 and inflates to enter between the left and right thighs MTL and MTR of the occupant MP. It is formed. Therefore, by inflating the protrusion 140 so as to enter between the thighs MTL and MTR, the center of the airbag 120 in the left-right direction can be made to substantially match the center of the left-right direction of the occupant MP. can be positioned and inflated. Although the protrusion 140 is described as being disposed on the airbag 120, it can of course also be disposed on the airbags 25, 80, 80A, 100, and 100A of other embodiments of the present invention. good.

実施形態において、エアバッグ80,80A,100,100Aでは、膨張完了時に、乗員MPの胸部MBの前方に、内部に膨張用ガスを流入させて膨張する膨張領域が形成されていないことから、胸部MBが、エアバッグ80,80A,100,100Aと接触することを確実に抑制できる。なお、エアバッグ25,120では、胸部MBを膨張したエアバッグ25,120(胸部保護領域42や凹部135周縁の部位)と接触させる構成であるが、いずれも、肩拘束部50L,50R,133L,133Rによる肩MSL,MSRの拘束後であることから、胸部MBを必要以上に押圧せず、胸部MBを含めた上半身MUを、的確に拘束することができる。 In the embodiment, the airbags 80, 80A, 100, and 100A do not have an inflation region in front of the chest MB of the occupant MP that is inflated by flowing inflation gas into the interior when the inflation is completed. It is possible to reliably prevent the MB from coming into contact with the airbags 80, 80A, 100, 100A. Note that the airbags 25, 120 are configured to bring the chest MB into contact with the inflated airbags 25, 120 (the area around the chest protection area 42 and the recess 135); , 133R, the upper body MU including the chest MB can be restrained accurately without pressing the chest MB more than necessary.

実施形態の乗員保護装置Sでは、シートベルト7とインフレーター17とが、シート1に搭載される構成とされている。そのため、シート1を前後で大きくスライドさせたり回転させたりして、車両に対して移動させた状態で使用する場合にも、シート1に着座した乗員MPを、エアバッグ25によって的確に保護することができる。勿論、本発明の乗員保護装置は、このような構成のシートに限定されるものではなく、リトラクタを車体側に設けたシートベルトにより乗員を拘束するタイプのシートに搭載することもできる。また、インフレーターも、車両のボディ側に取り付ける構成としてもよい。 In the occupant protection device S of the embodiment, the seat belt 7 and the inflator 17 are mounted on the seat 1. Therefore, even when the seat 1 is used in a state where it is moved relative to the vehicle by largely sliding or rotating back and forth, the occupant MP seated on the seat 1 can be accurately protected by the airbag 25. Can be done. Of course, the occupant protection device of the present invention is not limited to a seat having such a configuration, and can also be mounted on a type of seat in which an occupant is restrained by a seat belt provided with a retractor on the vehicle body side. Further, the inflator may also be configured to be attached to the body side of the vehicle.

1…シート、7…シートベルト、10…ラップベルト(保持体)、17…インフレーター、25…エアバッグ、26…バッグ本体、28a…上端、28b…下端、38…支持膨張部、38a…下面、39…被支持面、41…頭部保護部、42…胸部保護領域、43…胸部受止面、45…規制テザー、50L,50R…肩拘束部、75…保持体、80,80A…エアバッグ、81…バッグ本体、83,83A…支持膨張部、85…被支持面、87,87A…前側膨張部、88,88A…後端側部位、89…肩拘束部、92L,92R…テザー(拡開抑制手段)、95…厚肉膨張部位(拡開抑制手段)、100,100A…エアバッグ、101…バッグ本体、103…支持膨張部、106…被支持面、108L,108R,108AL,108AR…肩拘束部、111…テザー、113…連通膨張部、120…エアバッグ、121…バッグ本体、130…支持膨張部、131…被支持面、133L,133R…肩拘束部、135…凹部、140…突出部、MP…乗員、MU…上半身、MH…頭部、MSL,MSR…肩、MB…胸部、MD…下半身、MW…腰部、MTL,MTR…大腿部、S…乗員保護装置。 DESCRIPTION OF SYMBOLS 1... Seat, 7... Seat belt, 10... Lap belt (holding body), 17... Inflator, 25... Air bag, 26... Bag body, 28a... Upper end, 28b... Lower end, 38... Supporting expansion part, 38a... Lower surface, 39... Supported surface, 41... Head protection part, 42... Chest protection area, 43... Chest receiving surface, 45... Regulation tether, 50L, 50R... Shoulder restraint part, 75... Holding body, 80, 80A... Air bag , 81...Bag body, 83, 83A...Supporting and inflating part, 85...Supported surface, 87, 87A...Front side inflating part, 88, 88A...Rear end side part, 89...Shoulder restraining part, 92L, 92R...Tether (expanding) (opening suppressing means), 95... Thick walled expansion part (expansion suppressing means), 100, 100A... Air bag, 101... Bag body, 103... Supporting inflation part, 106... Supported surface, 108L, 108R, 108AL, 108AR... Shoulder restraint part, 111... Tether, 113... Communication inflation part, 120... Air bag, 121... Bag body, 130... Support inflation part, 131... Supported surface, 133L, 133R... Shoulder restraint part, 135... Recessed part, 140... Projection part, MP...occupant, MU...upper body, MH...head, MSL, MSR...shoulder, MB...chest, MD...lower body, MW...lumbar region, MTL, MTR...thigh, S...occupant protection device.

Claims (7)

シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれた前記エアバッグを収納させて保持するとともに、前記シートに着座した乗員の腰部の前方に配置される保持体と、
前記エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
前記エアバッグが、内部に膨張用ガスを流入させて前記保持体から突出し、前記乗員の前方を覆うように膨張する構成とされて、前記乗員の左右の大腿部の上面側において前後方向に略沿って延びるような略板状に膨張する支持膨張部と、前記支持膨張部の前端側から後上側に向かって延びるような略板状に膨張する前側膨張部と、を備えて、
該前側膨張部の後端側の領域が、膨張完了時に前記乗員の左右の肩の前方に配置されて、該肩を拘束可能な肩拘束部として、構成され、
前記支持膨張部が、左右の前記大腿部の上面を覆うように配置されて、膨張完了時に前記肩拘束部を支持するとともに、膨張完了時の下面側に、前記乗員受止時に前記乗員の左右の大腿部により支持される被支持面を、配設させる構成とされ、
前記前側膨張部と前記支持膨張部とが、膨張完了時の左端側と右端側とにおいて、それぞれ、テザーにより連結されて、前記前側膨張部の後端を前記支持膨張部側から離隔させるような拡開を抑制可能な構成とされていることを特徴とする乗員保護装置。
An occupant protection device for protecting an occupant seated in a seat,
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holder that stores and holds the folded airbag and is disposed in front of the waist of an occupant seated on the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant , and is configured to inflate in the front-rear direction on the upper surface side of the left and right thighs of the occupant. comprising a support inflation part that expands into a substantially plate shape that extends substantially along the support inflation part, and a front inflation part that expands into a substantially plate shape that extends from the front end side of the support inflation part toward the rear upper side;
A region on the rear end side of the front inflatable part is configured as a shoulder restraint part that is disposed in front of the left and right shoulders of the occupant and can restrain the shoulders when the inflation is completed ;
The support expansion part is arranged to cover the upper surfaces of the left and right thighs, and supports the shoulder restraint part when the inflation is completed, and also supports the shoulder restraint part when the expansion is completed, and the support expansion part is arranged to cover the upper surface of the left and right thighs, and supports the shoulder restraint part when the expansion is completed, and the support expansion part is arranged to cover the upper surfaces of the left and right thighs, and supports the shoulder restraint part when the inflation is completed, and the support expansion part is arranged to cover the upper surface of the left and right thighs, and supports the shoulder restraint part when the inflation is completed, and the support expansion part is arranged to cover the upper surfaces of the left and right thighs, and supports the shoulder restraint part when the inflation is completed, and the support expansion part is arranged to cover the upper surfaces of the left and right thighs. The supported surface is supported by the left and right thighs of the patient,
The front inflatable part and the support inflatable part are connected by tethers at the left end and right end when inflation is completed, respectively, so that the rear end of the front inflatable part is separated from the support inflatable part. An occupant protection device characterized by having a configuration capable of suppressing expansion .
シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれた前記エアバッグを収納させて保持するとともに、前記シートに着座した乗員の腰部の前方に配置される保持体と、
前記エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
前記エアバッグが、内部に膨張用ガスを流入させて前記保持体から突出し、前記乗員の前方を覆うように膨張する構成とされるとともに、
膨張完了時に前記乗員の左右の肩の前方に配置されて、該肩を拘束可能に構成される肩拘束部と、
膨張完了時の下端側において前記肩拘束部を支持するとともに膨張完了時に前記乗員の左右の大腿部の上面を覆うように配置されて、膨張完了時の下面側に、前記乗員受止時に前記乗員の左右の大腿部により支持される被支持面を、配設させて構成される支持膨張部と、
を備え
前記支持膨張部が、前記エアバッグの膨張完了時に、前記乗員の左右の大腿部の上面側において前後方向に略沿って延びるような略板状として構成され、
前記肩拘束部が、前記エアバッグの膨張完了時に、前記支持膨張部の左右両端近傍においてそれぞれ上方に延びるように形成されるとともに、前後方向に略沿った略板状として、後面側によって、前記乗員の左右の肩を、それぞれ、拘束可能に構成され、
前記各肩拘束部が、相互の離隔を規制可能に、内部に膨張用ガスを流入させて膨張する連通膨張部により、相互に連通されていることを特徴とする乗員保護装置。
An occupant protection device for protecting an occupant seated in a seat,
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holder that stores and holds the folded airbag and is disposed in front of the waist of an occupant seated on the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant,
a shoulder restraint part configured to be arranged in front of the left and right shoulders of the occupant and capable of restraining the shoulders when inflation is completed;
The shoulder restraint part is supported on the lower end side when the inflation is completed, and is arranged so as to cover the upper surfaces of the left and right thighs of the occupant when the inflation is completed. a support expansion section configured by disposing supported surfaces supported by the left and right thighs of the occupant;
Equipped with
The support inflation portion is configured as a substantially plate-shaped member that extends substantially along the front-rear direction on the upper surface side of the left and right thighs of the occupant when inflation of the airbag is completed;
The shoulder restraint part is formed so as to extend upward near both left and right ends of the support inflation part when the airbag is fully inflated, and has a substantially plate shape approximately along the front-rear direction, so that the shoulder restraint part extends upwardly from the rear surface side. It is configured to be able to restrain the left and right shoulders of the occupant, respectively.
An occupant protection device characterized in that each of the shoulder restraint parts is communicated with each other by a communication inflation part that inflates by allowing inflation gas to flow therein so as to be able to restrict separation from each other.
シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれた前記エアバッグを収納させて保持するとともに、前記シートに着座した乗員の腰部の前方に配置される保持体と、
前記エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
前記エアバッグが、内部に膨張用ガスを流入させて前記保持体から突出し、前記乗員の前方を覆うように膨張する構成とされるとともに、
膨張完了時に前記乗員の左右の肩の前方に配置されて、該肩を拘束可能に構成される肩拘束部と、
膨張完了時の下端側において前記肩拘束部を支持するとともに膨張完了時に前記乗員の左右の大腿部の上面を覆うように配置されて、膨張完了時の下面側に、前記乗員受止時に前記乗員の左右の大腿部により支持される被支持面を、配設させて構成される支持膨張部と、
を備え
前記保持体が、シートベルトにおいて装着時に前記乗員の腰部を拘束するラップベルトから、構成され、
前記エアバッグが、膨張完了形状を、軸方向を左右方向に略沿わせた略三角柱状として、下端側の領域を前記支持膨張部とし、膨張完了時の上端側における左右両端側の部位を、前記肩拘束部とするとともに、前記肩拘束部間となる上端側における左右の中央側の領域の後面側を、相対的に前方に凹ませるように、構成されていることを特徴とする乗員保護装置。
An occupant protection device for protecting an occupant seated in a seat,
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holder that stores and holds the folded airbag and is disposed in front of the waist of an occupant seated on the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant,
a shoulder restraint part configured to be arranged in front of the left and right shoulders of the occupant and capable of restraining the shoulders when inflation is completed;
The shoulder restraint part is supported on the lower end side when the inflation is completed, and is arranged so as to cover the upper surfaces of the left and right thighs of the occupant when the inflation is completed. a support expansion section configured by disposing supported surfaces supported by the left and right thighs of the occupant;
Equipped with
The holding body is composed of a lap belt that restrains the waist of the occupant when worn as a seat belt,
The airbag has an approximately triangular prism shape with the axial direction substantially parallel to the left-right direction, and the lower end region is the support inflation portion, and the upper end and left and right end portions when the inflation is completed are as follows: The occupant protection is characterized in that the shoulder restraint part is configured such that a rear surface side of a region on the left and right center side on the upper end side between the shoulder restraint parts is recessed relatively forward. Device.
シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれた前記エアバッグを収納させて保持するとともに、前記シートに着座した乗員の腰部の前方に配置される保持体と、
前記エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
前記エアバッグが、内部に膨張用ガスを流入させて前記保持体から突出し、前記乗員の前方を覆うように膨張する構成とされるとともに、
膨張完了時に前記乗員の左右の肩の前方に配置されて、該肩を拘束可能に構成される肩拘束部と、
膨張完了時の下端側において前記肩拘束部を支持するとともに膨張完了時に前記乗員の左右の大腿部の上面を覆うように配置されて、膨張完了時の下面側に、前記乗員受止時に前記乗員の左右の大腿部により支持される被支持面を、配設させて構成される支持膨張部と、
を備え
前記保持体が、シートベルトにおいて装着時に前記乗員の腰部を拘束するラップベルトから、構成され、
前記エアバッグが、
膨張完了形状を、軸方向を左右方向に略沿わせた略三角柱状として、下端側の領域を前記支持膨張部とされる本体膨張部と、
該本体膨張部の上端側における左右両縁側において、それぞれ、前記本体膨張部よりも後方に突出するように形成される前記肩拘束部と、
を備えるとともに、
前記本体膨張部における前記支持膨張部の上方となる領域に、膨張完了時の後端側において上下方向に略沿って延びるとともに左右の前記肩拘束部の前部側と連なって形成されて、前記肩拘束部に前記肩を拘束された状態の前記乗員の胸部を受け止め可能とされる胸部受止面を配設させ、
該胸部受止面の上方となる膨張完了時の上端側に、前記乗員の頭部を保護可能とされる頭部保護部を、配設させる構成とされていることを特徴とする乗員保護装置。
An occupant protection device for protecting an occupant seated in a seat,
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holder that stores and holds the folded airbag and is disposed in front of the waist of an occupant seated on the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant,
a shoulder restraint part configured to be arranged in front of the left and right shoulders of the occupant and capable of restraining the shoulders when inflation is completed;
The shoulder restraint part is supported on the lower end side when the inflation is completed, and is arranged so as to cover the upper surfaces of the left and right thighs of the occupant when the inflation is completed. a support expansion section configured by disposing supported surfaces supported by the left and right thighs of the occupant;
Equipped with
The holding body is composed of a lap belt that restrains the waist of the occupant when worn as a seat belt,
The airbag is
a main body inflatable portion whose fully inflated shape is a substantially triangular prism shape with the axial direction substantially parallel to the left-right direction, and whose lower end region is the support inflatable portion;
The shoulder restraint portion is formed to protrude rearward from the main body inflatable portion on both left and right edge sides of the upper end side of the main body inflatable portion, respectively;
In addition to providing
The main body inflatable part is formed in a region above the support inflatable part, extending substantially along the vertical direction on the rear end side when inflation is completed, and continuous with the front part sides of the left and right shoulder restraint parts; disposing a chest receiving surface capable of receiving the chest of the occupant with the shoulders restrained in the shoulder restraint part;
An occupant protection device characterized in that a head protection portion capable of protecting the head of the occupant is disposed above the chest receiving surface on the upper end side when inflation is completed. .
前記胸部受止面が、前記エアバッグの内部に配設されるテザーによって、前記エアバッグの膨張完了時に、後方への突出を規制されていることを特徴とする請求項4に記載の乗員保護装置。 Occupant protection according to claim 4, wherein the chest receiving surface is restricted from protruding rearward by a tether disposed inside the airbag when the airbag completes inflation. Device. シートに着座した乗員を保護するための乗員保護装置であって、
可撓性を有したシート体から構成される袋状として、折り畳まれて収納されるエアバッグと、
折り畳まれた前記エアバッグを収納させて保持するとともに、前記シートに着座した乗員の腰部の前方に配置される保持体と、
前記エアバッグに膨張用ガスを供給可能なインフレーターと、
を備える構成とされて、
前記エアバッグが、内部に膨張用ガスを流入させて前記保持体から突出し、前記乗員の前方を覆うように膨張する構成とされるとともに、
膨張完了時に前記乗員の左右の肩の前方に配置されて、該肩を拘束可能に構成される肩拘束部と、
膨張完了時の下端側において前記肩拘束部を支持するとともに膨張完了時に前記乗員の左右の大腿部の上面を覆うように配置されて、膨張完了時の下面側に、前記乗員受止時に前記乗員の左右の大腿部により支持される被支持面を、配設させて構成される支持膨張部と、
を備え
前記支持膨張部が、前記被支持面から下方に突出しつつ、前記乗員の左右の前記大腿部間に進入するように膨張する突出部を、有する構成とされていることを特徴とする乗員保護装置。
An occupant protection device for protecting an occupant seated in a seat,
An airbag that is folded and stored in a bag shape made of a flexible sheet body;
a holder that stores and holds the folded airbag and is disposed in front of the waist of an occupant seated on the seat;
an inflator capable of supplying inflation gas to the airbag;
It is configured to include
The airbag is configured to cause inflation gas to flow into the airbag, protrude from the holder, and inflate to cover the front of the occupant,
a shoulder restraint part configured to be arranged in front of the left and right shoulders of the occupant and capable of restraining the shoulders when inflation is completed;
The shoulder restraint part is supported on the lower end side when the inflation is completed, and is arranged so as to cover the upper surfaces of the left and right thighs of the occupant when the inflation is completed. a support expansion section configured by disposing supported surfaces supported by the left and right thighs of the occupant;
Equipped with
Occupant protection, characterized in that the support expansion part has a protrusion that protrudes downward from the supported surface and expands so as to enter between the left and right thighs of the occupant. Device.
前記保持体が、シートベルトにおいて装着時に前記乗員の腰部を拘束するラップベルトから、構成されていることを特徴とする請求項1、2または6のいずれか1項に記載の乗員保護装置。
The occupant protection device according to any one of claims 1, 2, and 6, wherein the holding body is constituted by a lap belt that restrains the waist of the occupant when the seat belt is worn.
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